Halo 3
I'm not buying Halo 3. I've been playing the Call of Duty 4: Modern Warfare beta lately. I might buy H3 eventually but don't really care to buy it at this point. Surprisingly being involved in the Halo 3 beta made me not want to buy the game. I think the replay ability and map editing options look phenomenal, but I'm not that interested in the game itself. COD4 is going to be the next FPS I buy.