I really love At Vance's version of Vivaldi's Four Seasons, especially "Summer."
A band from Houston Texas SCALE THE SUMMIT all instrumental progressive metal
Equilibrium - Mana
Rush - La Villa Strangiato
Some of my favorite instrumental tracks:
Pain of Salvation: Dryad of the Woods
Payne's Gray: Unison
Payne's Gray: Dream Sequence
Riverside: The Same River (it has a few lyrics towards the end)
Lemur Voice-Akasha Chronicles. That would be my favourite.
It'd be a stretch to call it a 'metal' instrumental, but it's always been one of my absolute faves from Rush.
I still pull out Tony McAlpine's - Maximum Security from time to time. I had forgotten about it for many years till a thread here reminded me, but it's back in rotation...just not quite as much as in the 80s....
I think you are my hero lol!!
John Petrucci & Jordan Rudess - An Evening w/John Petrucci & Jordan Rudess
I was going to mention Marcel, so it was rather cool to see him linked up. He also has two solo CDs out, besides Lemur Voice, Sun Caged and his various guest work. Colour Journey is half instrumental (I sing on two/play piano on one of them) - it's all over the map stylistically, as he wanted to focus on his song writing across a broad spectrum. Before that is Guitartalk, which would also be right up your alley, Mystic.