Yea...Your power supply needs an upgrade if you are going to buy a new video card. The newer and mostly (better) video cards such as the EVGA 8/9800GT and the Radeon cards stated above need more power...especially if you are going to overclock.
AMD's cards are better currently, though. i wonder if that is why mr maroon has been absent? maybe just busy. in any event, good to see you again maroon.