Hello, I want to buy a pc that can take on current and soon to be released games (Need for speed: MW2, COD: Black ops 2, etc)under $600-$650 budget. My monitor resolution is 1280 x 1024. No need for keyboard, mouse, sound system, monitor, etc.(already have them). I want to play the games at least in high settings. Please suggest me some good specs. Thank you!