Just my opinion......but I would wait until Vista has been out long enough for all the bugs to become appearant. Maybe even until it has it's first SP. There's nothing wrong with XP. XP is prolly the best and most stable windows yet and I will still be loading machines with it long after Vista is even out. Now I myself will prolly get a copy just out of curiosity and angst, but you definately will not go wrong with XP. Besides, if ur machine is down now, you need something to run till Vista is out, right? I usually completely reformat mine every 4-6 months anyway. I would definately put XP backk on it and then when Vista is out, start watching the reviews for a more educated decision.