Suffocation,Cannibal Corpse,Death,Immolation,Morbid Angel and Nile are my top 6 death Metal bands,Suffocation and Immolations break downs are legendary,Nile's speed and clarity are unparalled,Cannibal Corpse is among the more brutal true to death metal bands out there without throwing away technique for gore and Death is.......Death,they are pretty amazing,all around fundamentally sound.Cryptopsy may be the most technically proficient death metal band on the planet,Decapitated is also very good as well,especially for being so young,Opeth is a good prog/death metal band,melodically devastating and Morbid Angel just flat out rocks evil,sick riffs maybe the best riffers of the bunch as a whole.Any of these bands should get you just what your looking for,Death Metal as it should be played,each with it's own sense of style but each equally devastating.