If you're in the US or Canada then you could also have a look at Global Poker..Not as many players as some of the others like PokerStars, but they do lots of advertising on sites like Facebook so the competition is pretty soft. They've got both jackpot SnG's and 6 player SnG's. However, they're often Turbo and Hyper Turbo structure which I'm guessing is because their player base is a little smaller.