Therefore, I am thinking whether to buy a Mac Pro (possibly wait till the new one comes out) or custom build a PC. As I understood, rendering in Maya depends heavily on the processing power and the RAM and not that much on the GPU, but does the number of cores do anything good (i.e. 12 cores in Mac Pro) to reduce the rendering time?? or just look at the Hz is enough?
Any other things I should be conscious of when assessing the rendering power of a workstation?