I'm guessing you like kinda thrashy/faster stuff so i wouldnt really recommend Opeth, My Dying Bride or Anathema although i cant get enough of all three (they are heavy but tend to be rather slow and depressing, although maybe you enjoy that kinda stuff too, anathema's later stuff isnt even metal any longer it's more porcupine tree style prog rock). I'd say go for some Devin Townsend or Strapping Young Lad and probably In Flames and Dark Tranquility.