Basically, you are building a workstation. Have you checked any workstation manufacturers on line to see what components they use?
Not one uses AMD. Every major manufacturer uses 2011 socket Intel with Xeon processors.
I myself have been critical of this. I feel that the Zambezi chipset could be, with very little trouble, made to compete with Intel in this niche. But AMD doesn’t feel so, so Intel owns the workstation market.
Too many people do not understand the difference between a high end gaming machine and a rendering workstation. They are completely different animals with different purposes. They even sport radically different GPUs. A really, really good gamer graphics card will set you back $800-$1000. A really, really good rendering card will set you back $4000- $6000. That is just the GPU, not the CPU or the motherboard. Search out the two lines: Firepro and Quadro.
Workstations are so close to being servers that most just run Server as an OS instead of 7 Ultimate.
I am not trying to discourage you. If you want to render, there are solutions that you CAN afford. The Firepro V4900 is a decent mid-range rendering card that goes for $150. It does eyefinity and crossfire. I just don’t want you to buy and build a high end gaming machine only to find that when you try to render large files they are unusable.