@ about $1K it BETTER. Even the 3930k is like $580.
However Hopefully the lower cost for BD may help drive the IB prices down.
Myself with an I5-2500k, I see NO reason to blow money on either at this point.
I think the only thing you need in the future is a HD7970. Looks killer.
I myself need a whole new rig. But I can survive till 2012.