For someone building a new PC,if price is right, 4770K is the best you can buy. But for someone who already own SB or IB I doubt this would be a good upgrade. You have to sell your board and CPU ,buy a new combo, and for what? 3-8% IPC improvement with similar OC margin? Seems like a waste of money to me(unless someone doesn't care much for money and wants absolute best). Until AVX2/FMA3 workloads become normal IB at the same clock would be pretty much indistinguishable in legacy workloads from Haswell.