For display title, I would remove the "X" as the title that appears in the
scan doesn't have X, despite the Japanese name be "悪魔 城 ドラキュラ X". I would vote to remove the title "Akumajou Dracula X ~Nocturne in the Moonlight~". For me, it's just a random fan title probably spread by some download site. Also, I would use Dracula X for Alternate 2. To summarize:
Display: Akumajo Dracula ~Gekka no Nocturne~ Original Game Soundtrack
Original: 悪魔城ドラキュラX~月下の夜想曲~ GAME ORIGINAL SOUNDTRACK
Alternate 1: Castlevania: Symphony of the Night Original Soundtrack
Alternate 2: Dracula X ~Nocturne in the Moonlight~ Original Game Soundtrack
Just my opinion.