I too am on the fence regarding the mac pro. I need as much horsepower as I can get, and have been eyeing the eight-headed MP since it was introduced. (I am a chemical engineer working the area of rigorous dynamic simulation). I have been reading with great interest the threads on buying now versus waiting, and would like to ask one simple question: In the best case scenario, how much different do you think the next iteration of the Mac Pro will be compared to the current Dual Quad 3.0 GHz version? In particular I am interested in your opinion on speed and bang/buck. As a reference point, I would rate the new version of the MacBook Pro to be a relatively minor upgrade. I understand anything at this point is speculation... BTW, hi-end graphics are not a primary concern for my work, but I really want to start fooling around with DV editing ( a la some of the the Apple Pro tools). Thanks.