I suggest FT and Absolute. They both have a lot of NL games although I play mostly 2/4 and 3/6 LH. Absolute's players at 2/4 and 3/6 are actually really good, but I have been able to beat them and make a good profit considering they have a good rakeback deal.
If you do decide to sign up at either Absolute or FT you have to get rakeback. It takes barely any effort and you will get free money deposited into your account every month just for playing. Combine that with deposit bonuses and if you are breaking even you will be up every month.
A lot of rakeback affiliates have shutdown since the UIGEA, but if you PM me I can direct you to the best one on the net, and they are outside of the US so they aren't going anywhere. They also have freerolls on the sites every month (I played in one today and finished 15th for $50, but 1st was over $1600). Also if you refer me I get a little kickback from them (you'll still get your full rakeback) which would be nice

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