Oh, I don't know about not thinking about audiophiles. There's a hell of a lot of great music out there, metal included.
Any Opeth vinyl album will blow you completely away. Some of my favorites are Blackwater Park, Ghost Reveries, and Still Life. Very, very dynamic, extremely well mixed and recorded.
I pulled out one of my very old Judas Priest albums a few weeks ago, and it was quite a treat. I've got a copy of Hero Hero that includes tracks from Rocka Rolla as well as Sad Wings of Destiny. I think I just might pull that out again tonight!