It's either that or Metallica for me. Ride the Lightning for the sheer metal sound, but Metallica for the pure artistic brilliance. I've also listened to Master Of Puppets and Kill Em All, they were both great, but Ride the Lightning and the black album are masterpieces.I could talk about Ride the Lightning all day as, when it comes to Metallica, that's their best album they've ever released, in my opinion.