Processor selection is important!
There are many low priced Tablet PC's available with processors that are inadequate, too slow to render video, or even give a tolerable user experience.
Processors that are Too Slow ARE: VIA 8505 (400MHz), and Ingenic JZ4760 (600 MHz but still too slow!)

Presently, I recommend looking for at least the TCC8902 or the X220 Processors for a low priced Tablet PC choice.
If the Processor is too slow, purchasing the Tablet PC will be a waste of money.
This is one of the first and most important specifications I look for, when choosing a Tablet PC.
There is a Blog with more Processor information for comparison here.
Many times you will see a Tablet PC seller listing their Tablets processor as "Dual Core".
What they are claiming, in addition to the CPU, is the Display Processor/Co-Processor.

NOTE:
Apple iPad uses a 1GHz Apple/Samsung A4 Chip which is a Cortex A8 Processor - PowerVR SGX535 (2000 DMIPS)
Apple iPad 2 uses a 1 GHz Apple/Samsung A5 Chip which is a Cortex A9 Processor - PowerVR SGX543MP2 (2500 DMIPS)

There are many Tablet PC's with many different versions of the Android Operating System.
As the Android Operating System evolves, it gains more compatibility, and abilities.
One key area of popular concern is the version of Adobe Flash the Operating System is compatible with.

Your Tablet may have issues rendering Flash content utilizing only the latest Flash version.
This would be most apparent when browsing the web sites utilizing content in the latest Flash version.
For this reason you want to select a Tablet PC with the most up to date version of the Android Operating System in your price range.
Make sure the manufacturer of your Tablet PC will be providing flash / operating system updates for your Tablet PC.
Some manufacturers claim they have no intent to ever provide updates to certain Tablets. (Beware!)
Considering the vast selection of devices currently available around a reasonable price point, come with at least the Android 2.1 Operating System, I would presently recommend 2.1 be the lowest version of the Android operating system you consider.
Do not attempt to flash your Tablet with a flash update that is not specifically for your Tablet, as it will most likely render it non-functional!
This is also one of the first and most important Specifications I look for when choosing a Tablet PC.
The Android Operating System is based on Linux.
Also worthy of mention: Android Market wants to make sure that they create an application distribution mechanism for the Android Market, that ensures their users have the right experience.
For that reason, Android Market is not going to be available on devices that don't allow applications to run correctly.
Which devices do, and which don't, will be unit specific.
Froyo (Android 2.2) and lower are not optimized for use on tablets.
Because the apps wont all run correctly, Android Market wont allow access to Froyo (Android 2.2) platform tablet users.
This does not exclude the possibility of adding Android Market to your Tablet PC after you purchase it, but it will almost surely not come pre-installed.
The "Honeycomb" upgrade to Android, is the first version of Android designed for tablets instead of smart phones.
Many times devices can be "rooted" (add other firmware to the device). For this do a Google and / or YouTube Search. Do this at your own risk!

Market Access is important! (Application Market that is...)
The Market Access the Tablet has, or is compatible with, determines what applications you will be able to obtain for your Tablet PC after you purchase it! The applications you load on your Tablet, are the software programs that make the Tablet do things.
Without applications you have a computer with no programs to run on it.
The Android Market is the market you want to look for. Google Android Market is the original market for the Android Operating System.
Not every Tablet PC has access to the Android Market.
There are other markets, and while some of them are really good, they are not the Android Market!
Make sure your Tablet will have access to plenty of awesome applications, by making sure it can access to the right market.

Note: eoeMarket is in Chinese. If you only speak English, this may be an issue for you.
Android Market wants to make sure that they create an application distribution mechanism for the Android Market, that ensures their users have the right experience. For that reason, Android Market is not going to be available on devices that don't allow applications to run correctly.
Which devices do, and which don't, will be unit specific.
Froyo (Android 2.2) and lower are not optimized for use on tablets.
Because the apps wont all run correctly, Android Market wont allow access to Froyo (Android 2.2) platform tablet users.
This does not exclude the possibility of adding Android Market to your Tablet PC after you purchase it, but it will almost surely not come pre-installed.
The "Honeycomb" upgrade to Android, which is already available in several versions, is the first version of Android designed for tablets instead of smart phones. If you can get this on your Tablet, it is highly recommended.

Tablet PC sizes range from approximately 5" to 10".
Get smaller than 5" and you will be looking at an Android based smart phone, not a Tablet PC.
The original Tablet PC that started the flood of Tablet PC's on the market is the well known Apple iPad.
iPads where approximately a 9" Tablet PC.
There are pros and cons to each size, and neither one can be said to be better than the other.
Your selection should be based on your personal usage, and needs for the device.
The larger Tablets offer a larger display, and virtual keyboard for when you are typing, as well as being slightly less expensive for the included options.
The smaller Tablets are lighter, and much more portable than their larger counter parts.
The larger Tablets while nice to look at, and type on, must be carried around, while the smaller ones could fit in a LARGE pocket, or a ladies purse.

Most of the Tablet PC's offer Built in Storage. The capacity of the storage varies.
The most common capacity is 2 Gig.
The next most common capacity is 1 Gig followed lastly by 4 Gig.
More is better!
This is the actual space that most or all your apps and common personal files will reside in.
Note: You will want to obtain a micro SD memory card for additional storage
Do not confuse the 256 Meg, 512 Meg, or 128 Meg of DDR2 RAM / Memory with the Flash Memory used for storage.

There are many common features provided on current Android based Tablet PC's.
Most of the current Tablet PC's seem to include the following standard features:
256 Meg of DDR2 RAM / Memory (MOST but not all have 256 Meg - don't get 128 Meg - some have 512 Meg - 512 Meg is a bonus!)
802.11 b/g wireless networking - commonly used for wireless internet access - wireless (Wi-Fi) Hot Spots.
A speaker or speakers for sound
A micro SD slot handling up to 32 Gig micro SD memory cards (commonly referred to as a TF card in the device specifications)
At least 1-USB interface. USB 1.1 has 12 Mb/s of bandwidth (speed), and USB 2.0 has 480 Mb/s of bandwidth. Most Tablets offer USB 2.0
A Common use for the USB connection is a keyboard, and sometimes a mouse.

Other non-standard options include:
Camera - The resolution is rated in Mega pixels. More pixels is better. .3Megapixel (800X600) is common followed by 1.3Megapixel.
It is common to include a microphone (mic) when there is a camera, because the Tablets will record video, as well as taking photo's.

Accelerometer or G sensor - This senses the orientation of the Tablet, and rotates the display to correspond with the way you are holding the Tablet. The G sensor is also used with video games as a user input to control something in the game.

HDMI output - This allows you to connect your Tablet to your HD Television to view videos and other content on your Television.

GPS - Global Positioning System - This uses satellites in geosynchronous orbits to determine your position. This is commonly used with Google Maps on Droid Tablets in order to display your location on a map. It can also be used to navigate from where you are, to a desired destination.

3G - Wireless Broadband Internet service provided by your cellular provider. The SIM card from your cellular provider is inserted into the SIM slot on your 3G capable Tablet PC. You can then use the 3G service from your cellular provider for internet access.

Bluetooth - This allows you to wirelessly connect to Bluetooth devices, such as headsets, cell phones, printers, and possibly a wireless mouse and keyboard (if supported). Cell Phones may be wirelessly tethered using Bluetooth, in order to utilize their internet connection when away from Wi-Fi.

The work arounds presented here involve taking advantage of the cell phone you already have.
Many modern cell phones have 3G or 4G broadband internet capabilities, and more and more cell phones also have built in GPS capabilities.
Almost every modern Cell phones has Bluetooth capabilities built in.

Add a low profile USB Bluetooth adapter (if your tablet doesn't have Bluetooth built in - most don't) to wirelessly tether/connect the Tablet PC to your cell phone. This allows you to wirelessly use your cell phones 3G or 4G broadband internet connection, when there is no Wi-Fi Hotspot available. (Hint works for Laptops too!), as well as your cell phones GPS (if you have one).

If you don't have Bluetooth capability for both your Tablet PC and your cell phone, you can use a USB cable to tether/connect them, in order to take advantage of your cell phones 3G/4G and/or GPS capabilities.

Prices and selection are current as of  10/1/2011
Information presented here is derived from third parties, and third party web sites.
Every effort has been made to insure the accuracy of the information collected, organized, and presented here.
The collection and organization of the information presented here has been done as a convenience to visitors of this web site.
There is No Guarantee on the accuracy of any of the information presented, or that it will remain accurate for any period of time.
There are many more Droid Tablet PC's on the market, with even more becoming available, all the time.
These are Hot items, and there are many manufacturers in China producing new offerings, so frequently it is almost impossible to keep up.
For Americans, dealing with China may be riddled with issues.
Some of the common issues are: not receiving what you ordered, receiving, or exchanging damaged products, and getting your item through customs.
For this reason it makes sense to obtain your Tablet PC from a reputable American company.
These American companies will seek to provide the products people want, and will function as both a buffer, and a filter on our behalf's.
They want to make a profit, so they will seek the products with features we all want, and procure them from the manufacturers, in order to sell them to us. They want to avoid loss. If a product doesn't deliver, or is unreliable, sales would plummet, and they would be swamped with returns.
Many American companies are beginning to stock a fairly diverse selection of reasonably priced Droid Tablet PC's.
These American companies also are able to purchase large quantities, at huge discounts, and pass some of that discount on to us.
For these reasons it makes sense to consider what they have to offer, and to make our purchase from one of them.
This guide as well as the following comparison tables have been assembled as an aid to the visitors of this web site.
I hope you will find this information helpful!

This Ranking is based on Calculated Performance and Specified Features, and does not take price (value) into consideration, however it does list only the best price for the corresponding Tablet.
Use the Tables above, which list Tablet specifications, to find the features you are looking for in your price range and size, along with these Ranking Tables below to help you determine the best value, and find the best suited Tablet for your needs.

Naturally, One Would Consider a Higher Rank at a Lower Price, as long as it has all the desired features! (The Best Value!)