Hah. This thread is starting to get funny. Peavey makes some of the best metal amps that ever exisited. The 5150 is legendary, and probably used more than any other amp for heavy (there's that word again) music. The trick to making it sound really good is to lower the gain, and put an OD pedal in front of it. As a matter of fact, that's what the trick is for getting good sounds out of ALL the high-gain tube amps. The XXX is also a phenomenal amp. It's just like a woman...the more time you spend with it, the more it likes you. Kranks kick ass, and so do Engl Fireballs and Savages. Of course, there's the Mesa's too. The EMG "bad tone" comment above is way off base! You simply cannot beat the sound of those for metal in most situations. Granted, other pu's (Duncans, etc.) can sound great, but the EMG's give a little extra boost for metal, and in a recording situation there's nothing as quiet as active pu's. Jeff Loomis' stuff sounds fucking KILLER on TGE and the remix of EOR! It's pretty fucking arrogant to say that one of the world's best guitarists "doesn't know" what sound or amp he likes.
If you disagree with what I'm saying, then that's your right to do so. But you're not only in disagreement with me (who happens to be a professional producer/engineer), but also in complete disagreement with the top producers/engineers in heavy metal - and we all get paid to do this shit.