Ultimate workstation CPU/'S Help selecting

Hello, I need to build the ultimate graphics workstation but i do not know what to select

my budget is about 4500~4700 for the entire build.

I know what i want for the rest of the build but what processor or processors should i choose?

I will be running mostly 3d design software with a lot of polygons.
I want these to render as fast as possible...almost on the fly.

I will be working on cs/5.5 soon to be cs6
using photoshop and illustrator with advanced functions including liquify and live trace and images with 1000+ layers

hd video editing and encoding

little to no gaming

What is the best choice of processor?


Im thinking of using dual 16 core opterons running at 2.2 ghz. is that enough speed for this kind of work?

Thank you all in advance for your critiques and input.