I would say drop the gaming graphics card and get a Quadro.
So...
1. Get an i7 920 and use the OC'ing capability of that board. You can get it to 950/975 clocks without breaking a sweat or hurting stability at all.
2. Good support goes a long way. I would stick to EVGA boards because of the excellent support, both warranty-wise and update wise. The EVGA X58 SLI should do it for you, I think (don't quote me on that).
3. You will need all of that 12GB of RAM. Maybe even look into 24GB....
4. Drop the gaming card and get a
http://ncix.com/products/?sku=37707&...nologies%20Inc or similar. I'm not an expert on Quadro/FireGL cards, so I'm just throwing out a random guess.
5. Lian Li for sure. Nothing says professional like a Lian Li.
http://ncix.com/products/index.php?s...acture=LIAN-LI Newegg.ca - LIAN LI PC-B10 Black Aluminum ATX Mid Tower Computer Case - Computer Cases Canada Computers - Cases > Mid Towers : LIAN-LI PC-A10B Black Aluminum ATX Mid Tower Computer Case.
6. I'd get a Corsair HX850. It's very efficient and modular, so you will have a nice low power bill. That 5-10% of efficiency makes a huge difference if you're rendering for a long amount of time.
7. I'd want an SSD for OS and your common programs for sure. The Intel should do excellently.
8. Samsung F3's are usually quite a bit better. I might also consider 2-4 1TB's in RAID1 or similar for some back-up protection.
9. Get a Noctua NH-U12P or a Thermalright Venemous X and a nice quiet fan. You want a system you don't notice too much, right? Who wants a loud, hot PC?
I think that should do it.