+1 to 3770K
Both the CPU and the platform is cheaper (1155 vs 2011), plus of course the 3770K is unlocked and you can really juice it if you so desire. Also remember that it's Ivy Bridge, which means it'll be more efficient than 3820 (Sandy Bridge).
Generally, there's no question between these two CPUs. But ask yourself how intensive your work will be- maybe you will need a 2011 mobo? Will you have any use for the extra RAM capacity and PCIE lanes? My guess is no. If that's the case- go with 3770K on 1155, and you will actually get BETTER performance for LESS money.