So I've only really ever played a little bit of Castlevania 64, and one of the Castlevanias for the SNES. I've always been intrigued and wanted to buy one, but never got around to it. So now as the games' prices skyrocket through the roof, I'd like to pick up some of them (try to find them cheap of course.

Of the current game systems available (That I own or *might buy): GBA, DS, *PSP, PS1, PS2, *PS3

Which Castlevania games would you recommend? If you could tell me the TOP 7, I'd appreciate it. I'd like to know what to invest my money into, and what to stay away from.