Deposit bonus clears a little slow. Don't forget to get rakeback if you sign up.
Link for numbers. Fulltilt and PokerStars are considered the "big 2" sites for US players. Party would make it the big 3 if you're not in the US. Generally the choice between FT and PS has been couched as a choice between rakeback and customer service, respectively. FT has been hit hard in the customer service reputation on these boards recently. I play there and like the site fine. NL game selection seems better than limit, but that's pretty normal.