Quote From: Mac vs. PC III: Mac Slaughtered Again.
After looking at these startling benchmark results, we have to gaze over at our beautifully-designed Macs and ask, "Is it worth it?"
-Charlie White
Taking those benchmark results, the $629 price diffrence and if you want to use your Mac for other things(daily computing) facture in the other draw backs mentioned by others in this thread- expensive parts, lack of support, limited # of games designed for that platform, etc i would ask the same question too, "Is the Mac worth it?"