I dont understand why you wouldnt want to oc SB? Do you really understand how easy it is?
Show me a gamer who would choose SR-2/X5698 over an 4.5Ghz SB. And yes, i do talk to people and most people i know have mild oc on theire machines (yes, 4.5ghz SB IS a mild oc). Shure i have som friends/family that doesnt have an OC, but they certainly doesnt need no SB/SR-2 machine either.

So i still dont think an SR-2/x5698 machine is very realistisk because you got to be pretty mental(in my mind) to choose that over an 2600k based machine.