Get the Radeon 9800XT. That is what I have.
Here is its features:
Features
Cinematic Rendering
Up to 256MB of DDR memory provides increased performance when rendering high resolution textures, characters, and environments
256-bit memory interface delivers the bandwidth for real-time 3D graphics and barrier-free performance
8-pixel pipeline architecture doubles the rendering power of other graphics processors
Maximum 3D
SmartShader™ 2.1 supports the latest Microsoft® DirectX® 9.0 feature set, enabling cinematic quality lighting and shadow effects.
SmoothVision™ 2.1 delivers the sharpest, clearest textures without sacrificing frame rates.
128-bit full floating point precision enables billions of color variations to render the same lighting and effects as Hollywood studios.
Featuring Catalyst®, the industry's most stable 3D acceleration software.
Generation Now Technology
Supports the latest Microsoft® DirectX® 9.0 and OpenGL® feature sets, ensuring long-term compatibility with the hottest gaming releases.
FullStream™ removes blocky artifacts from streaming Internet video to deliver smoother looking, higher quality online content.
VideoShader™ integrates features to provide unprecedented support for digital and high definition video.
Only Products designed and built by ATI offer:
Hassle-free manufacturers warranty
Responsive and knowledgeable Customer Service Team
Extensive online user resources and updates through ati.com
Feature-rich, frequently updated, ATI designed Catalyst® software
Here is the link:
http://www.ati.com/products/radeon9800/radeon9800pro/features.html