theres a music artist that goes by Goat. he does a bunch of castlevania remixs with guitars, drums etc… his website is http://www.powergoat.com/ and some of the songs that i think are pretty sweet are:
http://powergoat.com/Music/goat%20-%20The%…%20Metroid).mp3 (metroid Medley)
http://powergoat.com/Music/goat%20-%20Scou…astlevania).mp3 (castlevania medley)