Would it be worth it to add a 64 mb Radeon 9000 to my G4 533 Dual? I drive a Apple 20 LCD which is a lot of pixels and I want to run some games like Sim City 4. Would I see a big differnce (I assume I would) or would I be better served by staying with the geForce2mx or getting another differnt card. I have never had a problem with the geForce 2, but now that I have a higher rez screen that can't sync well to lower rez's I wonder if I should upgrade for games and 3d work.