I tried heaps of voltages and in the end even whacked it on auto, same deal
I've got a three day weekend this weekend, I'll have more time to play around with it
EDIT: Didn't wait for the weekend, started this afternoon. I think I found the problem, when I was at 3.6GHz I had my memory at 1333MHz with the Ai Clock Twister set to Strong and I just had it set in my mind that my 4GHz attempts couldn't be failing because of the memory because it runs fine at that. It appears that it doesn't ring true at 4.0GHz lol.
I've backed it off to Light and I'm presently fine tuning.
It seems to be stable at these settings, I'm going to run Prime tomorrow morning when it's not so warm here (currently 28°C)
Teaser screenie from last night and Everest Bench
Bios Template, E3110 + Asus P5E3 (Bios 0904) + Kingston HyperX DDR3 1066