I absolutely love my A7. I spent all February researching: my only criteria was sub-$400 and Android. I finally narrowed it down to the A7 and the Archos A70, and went with the Elocity since the Archos is never in stock anywhere. I'm so glad I chose it. I have added market since then and it's awesome.
SIM doesn't matter to me since I recently happened to get an iPhone 4 which has Personal Hotspot, and I have tons of data on my plan with the iPhone. So whenever I'm now out-and-about, I connect the A7 to the iPhone and I'm on the 'net - life is grand!
I also get some personal satisfaction by using my Android device and my iOS device together - when the whole digital world seems to be about using one or the other.