i bought a HP tower from Microcenter for $550

Dual core 2.4ghz
2 gig Ram
DVD R
500gig HD
Media center for Flash cards, etc

All it needs is a Video card and i could play Crysis , COD, etc. I bought a 360gig HD SEagate for $60 at FRYs so now i have 850gig

I used my TV as a monitor.

I havea $60 logitech Keyboard an mouse (wireless blue tooth)

all in all
$550 for tower
$250 for video card
$60 for keyboard an mouse
$60 for extra Hard drive
$250 for LCD Monitor

thats all you would need.