I have read reports on here about the 2.26GHz 8-core Mac Pro being reportedly slow...but is it really THAT slow?? I mean, I am in the market for a Mac Pro right now and I don't really know if I will wait until the 6-core machines come out. How slow does the 2.26GHz feel in the Mac OS when navigating, opening apps? Is there a big difference between the 2.66GHz and the 2.93GHz? Also comparably how is the single core 3.33GHz vs the 8-core 2.26GHz? Any help would be appreciated. Thanks!!