what make of PSU?
[srtike]quite a few 400 watt do NOT have a 6 pin PCI power connection. that will matter.[/strike]
nevermind . .i looked at the budget again.
XFX HD-667X-ZHF3 Radeon HD 6670 1GB 128-bit DDR3 $79.99 $6.98 Shipping http://www.newegg.com/Product/Product.aspx?Item=N82E168...
$64.99 after mail-in rebate card
but if you can do the rebate game that ASUS EAH6670/DIS/1GD5 Radeon HD 6670 1GB 128-bit GDDR5 inzone posted below is sooooo much better!
Here are a few for you to look at and if you look at the chart you will notice that the HIS 6750 is the highest ranked card on the chart along with the 5750. From the Nvidia side the GTS 450 would be the higher ranked card.