Let's get into some debate...
Rank 'em:
Megadeth, Anthrax, Metallica, Slayer-
I go Megadeth first, then Anthrax with Joey Belladonna, then Metallica and Slayer- Megadeth for drive, Anthrax for overall heaviness, Metallica for originality, (but they lose some points with me, cause I hate the way Hetfield sings, almost country twang on it, and so many of their songs are repetitive as hell... plus the whole military thing later on kind of lost me...) Slayer just ends up at the bottom... I know that is probably not the popular opinion, but whatever...