Nice un snips, looks like you done ok in the silicon lottery. Once you get it under water it should help a wee bit more with temps.
I may try +0.00

I did try 4.8ghz @ +0.010 but i got a BSOD when launching RealBench. I think it's going to need closer to +0.015 or +0.025 for 4.8-4.9 and going by what I've achived so far, should easily hit 5ghz under water!