Gday, My site of choice would have to be Full Tilt.
Why, Well, if you are planning on making this a long term thing, then, Full tilt has a lot of other incentives, PROMOS, and the like.
To start with ther is the Full Tilt Academy, in this section you complete challanges for points, (which can be redeemed for prezzies), much like the Full Tilt store.
Happy hour is one of my favourites, double points, Rush Poker Ring Game, what more could you ask for.
There is always Iron Man, for the serious poker player, this is the only are I have not yet full done, but there is a one-a-day freeroll that is easy enough to go for.
USE THIS THREAD TO FIND OUT MORE ABOUT IRON MAN
Also, I have found that that the chat at Poker Stars is very hard to use, it goes from box to box while you are typing, plus on Full Tilt it is a lot easier to take NOTES.
All the best at the tables