I've been playing age of empires 3 on a P4 PC with 128 MB of shared VRAM, on a non-dedicated GPU. When I start to move the settings up from even the lowest possible, the game starts to lag. Is this also the case with the MBP in Vista, even with the GPU? I'm looking into buying one soon but if 128 MB isn't enough im gonna have to start saving pennies. TY in advance.