I'm wondering if you would be better of with a Hex Core Intel Core i7-3930K Sandy Bridge-E rather than the Quad Core Intel Core i7-3770K? Perhaps Dave Haynie could comment on this (although I see he's using an AMD hex core) because the the Core i7-3930K uses 4 channel memory which may address some of the "bottlenecks" that he eluded to in his post.
Vegas seems to love more cores. I'm thinking of using the Core i7-3930K for my next build since there are no hex core Ivy Bridge processors. :(
As for your graphics card question: I'd get an nVidia Quadro 4000. It seems to be the sweet spot of the Quadro lineup. I have one and I'm happy with it although I still have an old Core 2 Quad and the box did say that a Core i5/7 was the minimum specs so I'm hoping to get even more out of in with my next build.
I know lots of people are using the consumer gaming cards but they have gotten mixed results. If you're building a pro workstation, get a pro graphics card. If you can't afford one, then perhaps someone who has had good luck with their GeForce card can answer.
~jr
http://www.johnrofrano.com
http://www.vasst.com
