Sujeet
Undead!!!
Current gen. AMD GPU are pretty well for rendering tasks in apps like Maya,3dsMAX,Zbrush,etc and Provides additional benefit of improved Performance in Gaming too.Well, if he goes for a 8GB single stick, what's the problem? It will let you add more rams in future and save some slots. Regarding performance, the difference between dual channel and tripple channel is negligible in most of the real life cases.
I understood your concern but the problem is you're assuming that OP is gonna run his system for 24X7 and runs it at full load all the time. Then I think he must opt for a Intel XEON or AMD OPETRON based workstation rather than a PC. Also the time required to work on an Animation doesn't follow unitary metod like you have calculated.
However, by spending complete 85K if he can accomodate a 2600K, a good Gfx card and a good Z68/Z77 motherboard then he can go with it and you're right.
Regarding GPU, I think you are just putting whatever people are suggesting. GCN based new AMD cards are providing very good GPU computational power and that's why I have suggested HD 7850. Because of its Non-VLIW SIMD design it performs pretty well in GPU computing.
The problem with you guys are not to understand other points and start insulting them. Your point of getting 2600K within budget is perfectly okay but my VFM solution wasn't bad either in a different angle.
So there is nothing wrong in opting for a Non-Workstation card.