The performance of the 7800 GS AGP is very strong in Battlefield 2. This is the one game where the X850 XT PE truly falls behind the new AGP 7 series part. NVIDIA's lead is not a big one in this game, but it's there, and that's definitely a good thing for a cheaper part.
Clearly, the PCIe cards dominate our AGP lineup. The bottom line is that the bleeding edge in performance is simply not available on older platforms. Cards like the X850 XT PE, and now the 7800 GS are the best an AGP user is going to do.