I agree with Haxxiy, buy a PC its much better FPSwise. Although you will miss some of the games that come out on other consoles only.
I own PS3 and a PC and I play almost every game that came out, if its exculsive on 360 then just wait for it and it will be available on PC soon.
PLAYSTATION®3 is the future.....NOW.......B_E_L_I_E_V_E