Yeah I stick with 3 just incase 4 kills everyone else in family, I have a quad core and the computer dosnt get that hot (then again i've only had for a short time), vista is royal pain, although you can work around it with a virtual server... I have managed to get evil genius working on it without vista (will be corrected in the arena thread) and it seems to run fine... just vista being annoying because thats it ultimate goal... annoyance