hard to say. metal itself has too many subgenres
if youre the type of person to consider the modern metal that appeals to your average, albeit 'narrowlistening' (couldnt think of a word; doesnt seem too derrogatory does it?), teenager (ie Avenged Sevefold, Bullet For My Valentine, Underoath, Bring Me the Horizon etc) as metal, like a lot of other people i know, then the list is reasonably finite.
otherwise theres too much
dont get me wrong, they are great bands and i listen to every one of them, but the average metal-listening teen doesnt seem to have horizons beyond that, which is a bit sad for the metal scene. too many bands go unrecognised
aha, just looked at your profile - i see you extend a bit beyond the average teen with BTBAM. prog ftw i say.
but anyway, youll have to be a bit more specific with your definition of metal - even splitting it up into genres would be more than helpful
sorry if i came off as pompous or arrogant at all
What do you think the best metal bands are?