you see dungey cleaning up (for the most part) in his rookie season on the 450? pretty sweet.
How much of an OC are you shooting for? raise Vcore the up a bit, lower the memory ratio a notch and start raising the fsb. If you run into instability raise the Vcore some more (watchig temps of course). If that begins to not help stability try raising the northbridge and HT link voltage a bit. once you have round your max OC on the cpu start lowering the cpu multiplier and raise the fsb some more to help max out the HT link.