if you are US then bonus whoring just isnt going to happen.

IMO, stay away from FTP and stars.

UB and AP are ok, i think their games are better than the ones above.
Saying that, some of the prima's are still available to you and those games are going to be a hell of a lot better than anything else you have a choice of as is bodog, if you can fund it.

I think its fair to note poker.com that accepts US players still, but is quite small but has ok games.

Beyond that, you dont really have any more choices.
IMO, look to bodog, prima and maybe poker.com as the games are the best you can play in and you'll get some ok bonuses.