could easily cut half your expenditure on video cards just waiting for the gt200, plus that means you can save money on a psu also, which means you end up with either extra money left over or you can binge on a sweet sweet monitor.
edit: as far as psu's go my c2d, 8800gts, 2 hard drives, and 2gb ram with a few case fans are all running off an old but well made
OCZ Powerstream 420w psu. its not the wattage, its the quality that you should be looking for. now i'm not saying you can run multi cards with 420w but you don't have to jump to the quadruple digits just to power your system.