It seems to be that on the more recent games, the difference between 128vram and 256vram makes a hell of a difference in performance even with moderate settings. There are two factors that affect performance: the type of GPU and the amount of vram. In other words, having a fast GPU with limited vram is crippling just like having a relatively slow GPU with lots of vram is also crippling. This seems to explain why the comparative tests done between the mbpsr 2.2 vs mbpsr 2.4 yields such dramatically different results as can be seen here: http://www.insidemacgames.com/forum/index.php?showtopic=30457&st=20 So the bottom line is: does $500 justify way better gameplay (only on bootcamp offcourse), slightly faster CPU and more HD space? Well considering that for the price one can get a PS3, its a hard call!