As soon as the new model actually is available for sale (August), and can be obtained, I’ll be adding an in-depth performance analysis and comparison.
My initial focus will be comparing the existing 3.33Ghz quad-core Mac Pro Nehalem to the new 3.33GHz hexacore Mac Pro.
Note the “starting at” prices. I expect that the most useful machine, the 3.33Ghz hexacore, will be priced at about $3700, perhaps more. The 12-core 2.93GHz model is likely to come in at $6000 or so. Those are best guesses of course.