War Game

War game?

Ok i just got Xbox Live and I have no war games. I played a few before, but do not know what to get. I am deciding between Halo3, COD4, or Gears of War. What should I get? I want to make it easier cuz im beginning, the most competitive online multiplayer and of course the one thats more fun. Someone please help! I want one very badly And I will not spend money on a game that, as usual thanx! you do not have to send a request. I have friends with All 3 of these games could help me. thank anyway.

Halo 3 is a war game in the future Gears of War too much and do not know if many still play PPL GOW on the server ..... COD4 is a war game ...... But there are many professionals who ......