Shit, I know they were from Symphony of the Night...ummm...not sure of the titles, but I know where they were in the game...the main entrance music, the boss music for castle A, and I think the clocktower too.
BTW, ALL castlevania music is neoclassical metal, try to find a midi of Vampire Killer from the original game, you'll see what I mean. Also I know in Japan they did an actual neoclassical CD of Castlevania music with well known (in japan anyway) Japanese shredders doing the tracks.