I might sell my 3930k and buy the 4820k. I know the 4820k is a quad core but it's 3.7GHz and the 3930k is 3.2GHz. I'm mostly a gamer and I feel that 4 cores at 3.7GHz would be better for me than 6 cores at 3.2GHz, plus the little higher IPC of the IB-E. Also I think I would benefit more from a 4820k than a 4930k, as for my purposes I think that 4 cores at 3.7GHz would be better than 6 cores at 3.4GHz.