The choice of which tablet can be a daunting one, the first major decision you need to make is what do you want to do with it? Surf the web, ebooks, movies, music, ect... This will help you decide what equipment you will need.
Second question is, how tech savvy are you? Are you willing to experiment with the main operating system?
All these questions will help in your decision of which one to get. I personally chose the A81E due to my android tweaking background, and the enjoyment of flash based web browsing.
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my suggestion is wait until this holiday season, you have the Elocity a7 releasing, the Galaxy Tab, and many others from major manufactures, wait for reviews and grab the one most attractive to you. The 2 i listed have a early November suspected release