To hold over my urge to get a 2500K I took my mild overclock on my i7 920 from 3.8Ghz to 4Ghz, then to 4.21Ghz It's doin fine. I think the only thing holding it back is the memory. I'll be happy with it for a while. I've forgotten about the 2500K upgrade consideration.
Apparently the Sandybridge E series doesn't offer much more over the first iteration AFAIK and I don't plan on using a platform that will cost over 300-350$ next time. I went all out on Rig2 and I think that got me the experience I was looking for.