What would be a good Sandy Bridge Build that would give me the same processing power?
If you're looking to spend that amount of money then I'm sure you''re using an application capable of taking advantage of multiple cores / threads. If that's the case then there isn't a single-chip LGA1155 solution that would touch the specs listed.
An argument might be made for a dual G34 AMD Opteron alternative, but that would be more of an apples to apples comparison.
I'd also look to swap that SSD with one of the new generation (Intel 510 or even better OCZ Vertex 3 when they hit the retailers).