Chaintech Apogee AA6800 GeForce 6800 OC
 

If the price tag of today flagship cards are starting to scare you away from upgrading your graphics card (and at $500 I can't really blame you) you'll want to read this article in its entirety. The Chaintech AA6800 graphics card is based around latest 6800-series GPU, slightly slowed down, but with a much more reasonable sub-$300 price tag.

http://www.pcper.com/article.php?aid...e=expert&pid=1