What type of tablet should I buy?

[Nikola Petrovic]

The best for what you need is Asus Transformer (the new one is coming soon, but would be over your price with a dock, so go for the old one). It's got a keyboard dock (which includes additional battery), and that gives it an edge over anything else for the purpose you mentioned. Another one is the Asus Eeepad Slider, which has a sliding keyboard, weighs less than a transformer with a dock, but still is the heaviest Android tablet on the market.

The bad news is, if you need a tablet for serious work, no Android or iPad will do that for you. Their Office applications can't match Microsoft Office in any respect, not to mention more complex apps. For now, your best bet is a laptop.