Does Heavy Metal music benefit from a high end audio system?

A more interesting question is what does the $100K system get you that the $10K does not.

BTW - I have a feeling Led Zeppelin will still be in heavy rotation 100 years from now.

Exactly right, better said :)

All music benefits from a hi res system. But do you know what heavy metal is supposed to sound like? Iron Maiden "British Steel" is quite impressive. Great sound stage and separation of instruments. Black Sabbath and Led Zeppelin are often very good too. But like all music, some is not so good. It's obvious to me that some music styles seem to benefit more. Accoustic comes to mind? But I suspect that it shows more because it is generally a less busy style which is more easily heard

Iron Maiden "British Steel"

That would have been Judas Priest, not Iron Maiden.