So far the ones i'm debating on are:
Call of Duty 4
Mass Effect
Assassin's Creed
Bioshock
Gears of War
I'm trying to focus on multiplayer games as I can't really justify paying $60 for a game i'm not going to play a whole lot...(Bioshock, ACm and Gears of War, I've played the multiplayer before and wasn't impressed) Although I really want Mass Effect as if it's anything like KoTOR, I can not only put a ton of time into beating it, I also went ahead and played it roughly 15 times afterwards fully. This is just the first 2-3 games i'm getting, i'll still be getting more when my finances have stabilized a little bit

And on a lesser note, is there any real difference between the Halo 3 360 and the Premium that justifies a $30 difference (there is a play and charge kit included with the halo 3 version, that's why there's only a $30 difference). I don't care about the look of the console, just wondering for reference.