Cannibal Corpse (you have heard of them, of course)
Dew-Scented (GREAT German thrash band with a stupid name)
Behemoth (Excellent Polish black death)
Dismember (Really heavy/death from Sweden)
Nile (Egyptian-tinged death/grind)
Kataklysm (Heavy death/thrash from Canada)
Arsis (Pretty damned good American death/grind)
Nasum (RIP Mieszko: great Swedish grind)
The Crown (Heavy thrash/death from Sweden)
Krisiun (Brazillian death/grind)
Vader (Excellent Polish death metal)
Suffocation (death metal legends)
Defleshed (Swedish death)
Hate Eternal (Fast American death/grind)
Decapitated (Polish technical death metal)
Cephalic Carnage (American technical/death/grind/stuff)
Anata (really good Swedish death metal)
Vomitory (more really good Swedish death metal)
Immolation (New York death metal)
Incantation (Brutal American death metal)
Aborted (Belgian grindcore)
Cryptopsy (excellent Candian death metal)
Dying Fetus (if you can forgive one of the vocalists, HEAVY stuff)
Vehemence (I don't know where they are from, but they are okay)
Pig Destroyer (the best grindcore ever)
Necrophagist (Excellent German technical death metal)
Malevolent Creation (Good American death metal)
Grimfist (Swedish death)
The Black Dahlia Murder (American technical death)
Despised Icon (Canadian death)
Impaled Nazarene