Call of duty: Modern warefare 2

Considering that you’ve already invested in a library for XBox 360, I’d be inclined toward the Limited Edition MW2 XBox 360 Elite with 250 GB hard drive and 2 controllers. I’ve also heard something about the XBox 360 version having a better frame rate, though I haven’t personally tried the game myself.

IMO the major advantages with the PS3 version would be the free online and generally more reliable hardware. Another thing to consider would be which console more of your friends are playing it on. Also, which controller do you prefer in general? And for FPS games?