Wow really, that much power? It could be cheaper just to buy 3 Mac mini's and hook them up, although we'll have to wait and see how the new Mac Pro's
blow the old Powermac out of the water for comparison (how 3 Mac mini's compare with 1 Mac Pro ... very intriguing). I guess it's akin to adding in another DSP card for a higher track and plugin count (more voices).
I'm still waiting for Logic to improve/make more intuitive the audio editing capabilities. I'm sorry but Protools works gangbusters as far as editing goes. And with Logic you have to open another audio editor window or change fade values in some pane to the side or something ( -confusing as heck).