I can't see myself paying the kind of money apple wants for a Mac Pro again. My 2008 machine was great value but more and more, I see it as an anomaly....A blip in apple's otherwise uniformly overpriced strategy. I can stomach the apple tax for phones, ipads, even laptops on occasion but the Mac Pro's are stupid money for not even the best performance anymore.
For desktops now, I'm a Hackintosh guy and if Apple ever sqiushes that scene, I'll just migrate to Windows for the heavy lifting. None of the appeal from 2008 is still there for a workstation.
That said, I'd love apple to surprise me but it's a while since their surprises were nice ones.
Most of Apples products are not designed for the budget crowd. They are a premium product and so are priced accordingly.
Normally you won't find great value in a Mac Pro except in getting work done.
In many cases, cost is relative when compared ( Base models, not including adding extra memory ect. ) to the cost of the software & accessories that the Mac Pro is needed to run them.
If your using a Mac Pro just for email, Youtube & social networking, then its not going to be a good value.
Using it to do your job, tight schedules, high load requirements, dependability over long periods of time, thats what the Mac Pro was designed for.