ATI was the way to go back when it was the FX series vs. the Radeon 9xxx series. However, now its the other way around. I will admit the X850XT is slightly faster than the 6800 Ultra, but its definately not worth the price when you can get a 6800 GT for under $400 and overclock it to an ultra, plus you get Pixel Shader 3.0. If you go ATI, get the X800 XL, which is the only card this generation which is even half-way worth the purchase.