I notice now that someone mentioned Trey Azathoth from Morbid Angel. I have only hear two tracks by them and there metal sound was seriously grindingly heavy. For some reason "Noisy Mothers" cut off some of the guys solo, Heinous! Malmsteem was on the same show and quite honestly I couldn't separate them on technical merit, Azathoth with more tapping and Malmsteem with more sweeping. I'd be interested to know who else from the really heavy metal scene can really play. I know James Murphy (Cancer etc) can, every Testament player I've heard can (fave of their solos from "Legacy", was that Alex Skolnich?), Rocky George from Suicidal Tendencies is good too.