Best SS 6 max site?

[og5]

I'm unfamiliar with the world outside of party (thanks a lot for not offering 2/4-3/6 6 max!) What do you guys think is the best site in terms of game selection and rake(back) I'm looking at these so far:

Pokerstars: Playing here now, nice game selection but no rakeback. I think I'll be done after I clear the bonus here

Ultimate bet: I hear they have the toughest games across the board and I've gotten crappy rakeback offers from the affiliates (highest is 25 [img]/images/graemlins/frown.gif[/img]

Pokerroom: I don't know much about this site but after checking pokerpulse it looks like they are about as big as UB. Good rakeback offers on their skin.

I'm not interested in 5 max so Paradise is out.

Comments appreciated especially on Prima (They seem like a big site, do they offer SS 6 max)