Max was the soul of Sepultura, i got to see them with with Max right before he left. One of the best shows i ever saw. Mastadon was great live. I saw them with In Flames...... Flames was great but their sound was a smidge off on one of the guitars. Fear Factory rocks live! see them if you can. Raymond just about pounds the bass drum heads off.
The most underated Guitarist in my oppinion is Jeff King of Danzig. That man has more talent than the rest of the band put together. Glen Danzig has a huge ego problem and wont let King play the way he wants too, for risk of the croud not paying attention to him anymore. One time when i saw danzig Glen cut Jeff off in middle of a solo becuase all eyes were on Jeff and not Glen prantzing arround the stage.