Hi Bob, thanks for stopping by the forums. That is a serious demand for power. Before I could offer any "usable" advice, we need a few more specifics, because when you're talking rigs of this caliber, every little tweak for each program is going to count.
Since you just made an AMD Opteron 6272 render station, can you tell us what you like / don't like about it? Where is the speed lacking - in which program(s) or is it just lacking in raw crunching power for what you need? Where do you perceive the bottlenecks to be coming from at the moment?
Which rendering program(s) and what other programs (video editing, stills editing, audio production software, etc) will you want to run on the new workstation you plan to build? Certain hardware will perform faster with different programs, some are optimized for specific hardware.
Also, I'm just curious now - would you mind telling us a bit about yourself? I mean, are you a producer or an "Indie movie" studio, or just doing your own project for an animation class, etc? The reason I'm asking is . . . there is actually a BOINC project that renders!
So, you could create a BOINC project, and "farm out" your rendering tasks to all of us that would sign up for it, and in return for our rigs rendering your movie(s) and stills, we get "imaginative points" i.e., numbers on a spread sheet for how much our computers "crunched". Sounds like a deal, doesn't it?
It could really work in your favor if you have *a lot* of rendering to do for the next year or so...you wouldn't want to make the commitment of setting up the project unless it could have work for at least a year, I think. Longer - several years worth - even better.
I am actually curious about the project, though. If you don't mind sharing.