+1 on the Nexus 7. Rooted mine on day 1 because I didn't like all the spam on the home screen (and I'm a nerd). Fast, smooth, and good on battery. Google nailed the sub $200 tablet. I bought this to replace a Samsung GT 10.1 that I lost. I've been extremely happy with it. Only thing I really miss is that the DL app doesn't work on JB yet...
Some of the negatives about N7 on here are silly: No front camera (who actually uses a tablet to take pictures?), portrait by default (easily changeable with any of the custom ROMs out there), crappy speakers (headphones). Most of these things (as well as no vibration) were intentionally left out to cut costs.