No, this is what I am putting together as my next rig. I hope to order today.
I just checked a CPU reference chart and adjusted the results for overclocking on the i7 875K and the i7 3930K. I think I will save myself a bundle and do what you have done.
CPU Rating Price
Intel Core i7 K 875 @ 3.475 GHz 6616 429.99
Intel Core i7-3930K @ 3.52 GHz 13285 559.99
My current i7 is overclocked by 18.6%. Overclocking the 3930K by only 10% results in precisely double the CPU performance. Since the renders are CPU dependent, this should translate into a 50% time savings when doing the same render. That is to say, a 8 minute render with my current system should take 4 minutes with the 3930K - all other attributes being equal.
As I have some renders that take 4, 6 or even 8 hours to process, the “half the time” would be a huge performance boost.
Looks like you picked a winner! Let me know if my theoretical performance matches real world performance by doing my test render.