You have 8gb ram, 2 dvd-rw, 3 7200 rpm hds and will have at least 2 4800 series cards and 3 monitors?
Just get a huge power supply and u can relax and not worry:happy:
Why do you want 3 Monitors for gaming? If you were playing Flight sims, then I would be understanding.
But, FPS games? why not just get a huge HD TV or something?