Depends on what you are looking to play. Are you looking for SNG and MTT play or are you looking for CASH GAME play?

Here are a few suggestions though.

America's Cardroom / Black Chip Poker (Same player pool) gives rakeback automatic 27%
Bovada No Rakeback / NO p2p tranfers. Upside: Quick Payouts and Really fishy cash table play 25nl plays like 2nl most sites
Carbon Poker: I do not know much about it, but I hear there is good traffic there.

Now if you live in NJ/NV/CA/ or DE you have many better options. And I would recommend 888 / PARTY POKER if that was the case.