I've tested the: Xoom, Playbook, & iPad2 (significant seat time) and ended up going with the iPad2.

I am a fan of the Android platform, but the Xoom was laggy and the resolution was poor. Playbook, had very high hopes for it but it's a dud. iPad2 is the way to go, but I think the 3G is useless (AT&T) rarely get consistent connection and speed. It's best when I'm on WiFi.