Mark,
I play at Party Poker & Poker Stars. At this point I like Party Poker better for live action & Poker Stars better for tournaments. Party Poker gives you 10% interest on your money up to $10,000 which Poker Stars does not. Both offer an initial buy in bonus & then others every so often. The best thing to do is download the software from both & play the play money games & see which one you like best & then take it from there. Andy - Las Vegas