Saw Metallica couple of weeks ago in Antwerp and Rob had this amazing tone. Deep, distorted, brutal. There were four times 3 mesa 412's and 1 ampeg 810 on stage. I think one of the 412's and of course the 810 are Rob's because metallica.com states his amps as Ampeg SVT II and 810 cabs and mesa rectifiers and 412 cabs. Does anyone have an idea how much the mesa adds to his tone? Because I can't afford such a rig, but I could afford an SVT stack. But how close could I get to a tone like that without the mesa? Or should I just get a Berg 610 with my trace hexavale and look for the right distortion pedal to make it work?