Buying the new Mac Pro at least means you have the potential to upgrade the CPUs in 2-3 years time when the prices have dropped in order to get an extra year or two's longevity out of the system.
I thought that when the first 2 generations of Mac Pro were introduced, people were saying that they could upgrade the CPU relatively painlessly (compatible sockets etc.), but so far, I haven't really seen that coming... except for the hard core tech geeks, of course (and risk voiding the warranty).
I wonder if anyone would be able and willing to do a thorough investigation into Apple's pricing strategy... I don't mind things being expensive because of the material, R&D or manufacturing process...
but if they were priced so high simply because Apple have the power to do so (given its many loyal user base)... I am beginning to wonder that it's a bit like that "I am rich" app from the iTunes App Store.