Sapphire ATI Radeon HD 4770 Videocard Review
 

The HD4770 at this time is the bargain of the lot and at an introductory US$99 price, two of these cards in a Crossfire setup would be a fast US$200 combo that would handle most games reasonably well even at higher resolutions.
http://www.tweaknews.net/reviews/sapphire_hd_4770/