If you enjoy the nes ones there is something wrong with you. The snes one is moderately kick ass though.
My favorite is Bloodlines on Genesis. Great combination of controls, graphics, and music.
Edit: I forgot about Dracula X on PC Engine CD. Probably the best all-around, but Bloodlines is still really good.
The SNES version is ugly (which is shocking) and less enjoyable than the NES games in my opinion.