Well, assuming the CDs aren't just reprints of other soundtracks, then all of them. If they are just reprints, then I would like the disks that contain the games that never had a soundtracks. For example, Vampire Killer MSX, Castlevania Legends, Castlevania The Arcade, The Medal, etc.
I'm still pissed that Dracula X is not there, but oh well, watcha gonna do.