Some good metal bands/albums then:
Carpathian Forest - **** You All!!!
Carpathian Forest - Defending The Throne of Evil
Necrophagist - Onset of Petrification
Iron Maiden - Fear of The Dark
Scar Symmetry - Pitch Black Progress
Slayer - Christ Illusion
Slayer - Reign In Blood
Dimmu Borgir - Death Cult Armageddon
Bathory - Nordland II
Lamb Of God - New American Gospel
Lamb Of God - Sacrament
Dream Theater - Octavarium
Dream Theater - Systematic Chaos
Megadeth - United Abominations
Machine Head - The Blackening
Cannibal Corpse - KILL
Cannibal Corpse - Butchered At Birth
Cradle Of Filth - Thornography
Emperor - IX Equilibrium
Emperor - Prometheus: The Discipline of Fire & Demise
Impaled Nazarene - All That You Fear
Impaled Nazarene - Pro Patria Finlandia!
Children Of Bodom - Something Wild
Children Of Bodom - Hatebreeder
Immortal - Sons of Northern Darkness
1349 - Hellfire
Slipknot (Kinda) - The Subliminal Verses Vol III
Slipknot - Iowa
Also you should definately try Chevelle, they are pretty much hard Rock, look out for "I Get It and "The Fad" they are excellent songs.
Edit: Video of "I Get It" here:
http://youtube.com/watch?v=5PP-xZt9aag <3 Chevelle.