The 7" screen is the deal breaker for me. Don't care how many pixels they are squashing in there, I have tried and rejected many 7" tablets. The screens are just to small for my vision to cope with. Especially when the 7" is "widescreen" format.
A co-worker bought the Archos G9 10" and compared it to my Archos G9 8". The 10" is widescreen and the 8" is 4:3. They were the same width with the 10" being about an inch and a half longer.