When it comes to using a tablet as a laptop replacement, the first place anybody should look is the ASUS Transformer line. At the top of that hill stands the TF700T, reviewed here. If you happen to be in the market, Woot is offering the Transformer Pad Infinity for just $369.99 + $5 shipping. These are new units, not refurbished.
10.1" Super IPS+ Display @ 1920x1200
nVidia Tegra 3
1 GB RAM
32 GB Flash storage
8 MP rear camera, 2 MP front camera
Approx 9.5 hours battery life (25 Wh)
I know, you're wondering why a tablet released 9 months ago would still be attractive.