I would give pacific poker a go…no rakeback and spam…but keep them low profile most prof/semiprofessionals hate pacific because of their software which is full of bugs/disconnections etc. – Some love pacific, mainly because of the horrible players.
Paradise also good.
Poker Stars amazing, but only do CPA
stay away from all prima, cryptologic, UB, Absolute
Just a few from top of mind.
pokerpulse is a great place to check out the industry.