great cheap cards here:
http://www.newegg.com/
i was refered to tis site when i wanted to get a decent card for my cpu, but not "too" good because it isn't the "express". wanted a good card to play with until i got a new cpu.
for $100 i got the g-4 6800 with the 256 ram on it. not a bad deal, that was about 8 months ago. it is playing SH4 just fine. just a few things turned off.
rest of my cpu is:
Pent IV 3.2 ghtz
2 gig ram
then the card above. i was glad i just spent that amount of money on a card that runs everything i have tried ro play:
Battlefield II (full blast)
EQ1 (eq is a pig LOL)
LOTRO (almost full blast)
and multiple other games that run great.