sunn amps do metal , but the bottom end is looser than a ss randall, so if your chunkin around and you want tight stops and machine guns gallops and extreme crunch that sound tight and focused, then sunns arn't for you, but if you want a sick oldschool hella great tone thats super pedal friendly and is unique unto itself, buy a sunn, its got snarling in your face attack and it cuts threw any mix if you have the right setup, everyone will hear your playing for better or worse, i have grown up on the melvins and i can't get enuff of my sunn amps, they encompass the tone i want. i play many variations of metal, sunn rules.