Harmony and Arcade versions are the best versions, though Harmony's sounds so eerily similar to Demon Seed from CV3 that I'm surprised they didn't go all the way and throw it into the melody for a bit
Chronicles is the best. It genuinely has epic soundtrack. Vampire Killer fooling the player into thinking that the music is kinda like "the G fell of the GRAVEYARD sign", and then the second stage... Epic. Also VK is so fire
I often think of this song whenever I get to the "Cliffs of Insanity" scene in the movie The Princess Bride, very reminiscent of both levels that use this song in Castlevania 3 xP
Bloodlines exceeds at everything SCV4 did bad - and even better at what SCV4 did really good! Bloodlines gives a balanced, difficult experience, but you will always get further with every time you die. It has the most unique, weird and amazing set pieces. It has two characters that each play different enough to get different LEVELS! It has amazing music, too! ... Except Reincarnated Soul. I don't like this one, to be honest.
I was honestly slightly shook when I saw that Sound Voltex had a Vampire Killer remix when I first played SV. Then I was more shook because it slapped real god damn hard.