Those are good temps for your OC. You should be able to hit a much higher FSB using that mobo..you should try for 430*7 later using the same vcore, just bumping the FSBv, NBv and SBv a touch.
*Does the Rampage allow you to select the NB strap? If so you want to keep it either 266 or 333mhz. [the 266mhz strap may require more NBv than the 333mhz strap, depending on your current FSB.]