personaly i would get a new pci-e, i have the asrock 775dual-vsta that has both agp and pci-e, before i bought my new 7900gs i had a 6800gt in it, it ran most games on high but was limited i:e AA settings. Now i run BF2 at 1600x1200 on high settings with AAx4 getting between 60 and 100 FPS. By buying a pci-e you can migrated to future pci-e boards and maybe even go sli, a much better idea then buying older technology i:e agp.
palms