I am running an AMD Athlon 64 Dual Core 3800+ (XP) with a GeForce 7600 GT.. I bought that card when I first got this computer.. Do you all think I will see a big jump in performance by going from that card to a 250 GTS? I am on the fence at this point, but I think I would be all for it if it would show a solid increase in performance.. Thanks for any input!