"In fact SW Episide II has scenes that were render entirely on a macs with osx using maya." Generally speaking this sort of thing is not a good reasont o pick a platform. it might be a reasont o chose Mya, but not a compelling one to thinkt hat the Mac platform had an advantage. Math is math is math :) Seriously - we have a mixed environment here and at soem of the studios we work with and there is no compelling reaosn to go with the Macs, though OSX does give new life to older Mac hardware. For any given amoutn of money you will be able to get a OC that is as fast or faster with more RAM and HD, and you have access to a huge program library. Besides, XP kicks ass :) So if you have a mac now, stick with it. But if you were buying new hardware I'd say switch.