I really do like Windows 7, it is stable and efficient. I have no problems running it under Parallels or Boot Camp (64 bit shows all 12GB of RAM and both processors..Pro and Ultimate only). I liked XP too (Vista not at all). I did have some audio glitches and pops when trying to playback under Parallels which made it not so useful for running Entrainment software. It could have just been my particular configuration or install though.

If you really want to be hip, you must spell it 'fanboi'...