Gameing

I would say a single HD5850/70

I'd tahe THG's advice:

ttp://www.tomshardware.com/reviews/geforce-310-5970,2491.html

Here's the "winners" from THG's latest (December) GFX Roundup
Best Graphics Cards For The Money: December '09


$50 - HD 4650
$65 - HD 4670 / 9600 GSO
$85 - 9600 GT
$95 - 9600 GT / HD 4830
$110 - GTS 250 512 MB
$120 - GTS 250 1 GB
$155 - HD 5770 / GTX 260
$200 - HD 4890
$240 - 2 x GTS 250
$310 - No winner (HD 5850 Honorable Mention)
$330 - 2 x GTX 260 / 2 x HD 5770
$400 - 2 x HD 4890
$410 - No winner (HD 5870 Honorable Mention)
$465 - No winner (GTX 295 Honorable Mention)
$625 - No winner (HD 5970 Honorable Mention)

For a dual card setup you would need to upgrade your 450watt psu (from your other thread) you would need to do it anyway with HD5850/70. Here is a good deal http://www.newegg.com/Product/ComboDealDetails.aspx?nm_... you should jump on that one it is not going to last for long.

Yes, that is an excellent deal.