Re: I have $400 for a new video card.....
I'll make it easier:
based on my experience that's a true statement.
Have some patience. New 45nm ATI cards are due this Summer and from nvidia this Fall. Patience is key when shopping for video cards. I paid $650 for one 8800 GTX (at release) and $250 for another one 2 years later.
Core2Quad Q9550 @ 3.61Ghz (425x8.5)
evga 680i SLI (T1 Version)
8GB Corsair XMS PC8500 5-5-5-12 (SPD) DDR2@850Mhz
8800 GTX SLI
Corsair 750W PSU