The NV 3X series is better at lighting/shadows then the ati 9xxx series. The 9xxx series is better at pixel shaders then the NV 3X series and also has higher IQ. Basically, when both are implemented heavily (like in Doom 3) the ati 9xxx series cards tend to be a better choice due to their speed and image quality. When price comes into play, there is a ~$180 Leadtek 5900xt that can be oced pretty far (past 5900u speeds on most cards at stock) which will beat a STOCK 9800p in many games but will still have reduced image quality. On the other side, a ~$195 Abit 9800p will oc past 9800XT speeds on stock cooling and will fairly match the other card in benchmarks (one card will win some, while the other will win others. 60/40 split in favor of the ati card). So basically the main concern is the games you play, and how each card does on those games in comparison to oneanother. Also, if you are willing to sacrifice some image quality by going with the NV card because their older cards (NOT the 6800 line, but the 5xxx line) all have reduced image quality in comparison to the ati cards at similar settings for a savings of ~$15 give or take $10 either way due to the market fluctuating day by day.