From what I've read there's not much diff in gaming performance. I've finally decided to move over to Vista x64 after being more then happy with XP Pro. Apart from the fact that I couldn't get my aged Soundblaster Live! value card going, a driver I tried actually caused it to blue screen the PC now seems to running fine, feels slicker, I say feels but I have noticed that there are some pauses where it just seems to stall for a few seconds and UAC, good God not debating that the features not useful but I wonder if anybody in MS actually used a PC as a standard user and UAC enabled? Going to leave it on for the time being but the dimming of the screen and the pause before the dialog appearing is a right royal pain.