Very tough...very tough. For my money, Megadeth is the best band of these four. Not that I liked everything they did...or didn't bang my head NUMEROUS THOUSANDS OF TIMES to Thrax, Slayer, and Metallica, but I dug Deth the most of these four. Tough question though...splitting hairs for sure.
hmmmmm....its i tie between megadeth and anthrax! in my personal opinion metallica sucks...and i just satrted getting into slayer :) but if overkill was apart of the big 4 (well i guess it would be 5 then :P) they would be number one!! :)
MEGADETH!!!! MEGADETH! A MILLION TIMES MEGADETH!!! They just had the better songs...... (omg, did I just choose Megadeth on their musical value alone? Not like me....)
Then it goes Slayer (who are fantastic but basically only play one song, lol!), Anthrax (who would have beaten SLayer if it wasn't for the collaborations with Public Enemy, euch!) and Metallica who are last due to the fact that Lars Ulrich irritates the shit outta me sooooo much! Plus I only liked thir early stuff......
i like all 4 bands i listed , but im going to go with SLAYER why? because they sound harder and faster and they are even scary as hell!!!, slayer has relly good songs like raining blood and jesus saves, and my fav song of all angel of death