Based on what i've seen, especially in the xtremesytem.org forums, the E6 = teh suck for OCing.
Only a few out of everyone who bought them got decent OCs!
As Doomguy mentioned, the earlier the Venice (& even SD it seems), the better.
I think AMD has been binning the newer ones alot, so our "get a 3200+/3000+ & OC to 2.6 GHz" may not be happening anymore...