right now I have an asus a8v with an amd64 3200, a 6800 GS 256mb, and a gig of ram. Should I get a better AGP card, or go all the way and get a new motherboard w/ pci-e? I'm mainly wanting to run these 3 games well: oblivion (right now i'm at all low and still like <10 frames), Armed Assault, and a few future releases like C&C 3. What would be the best agp card to get that would run those well? I'm thinkin $200-300. tanks