I need some opinions on what are the MUST HAVE death metal albums for I am looking to buy some.

I have:

Amon Amarth- All

Cannibal Corpse- Gallery of Suicide, and The Wretched Spawn

Death- Human, Individual Thought Patterns, and Scream Bloody Gore

Morbid Angel- Altars of Madness

Nile- Ithyphallic

Opeth- All
Cannibal Corpse - Kill
At The Gates - Slaughter Of The Soul
Decapitated - any album
Nile - Annihilation Of The Wicked
Schecter C-1 Hellraiser
Ibanez GRG170DX
Peavey Vypyr 75
Fender Princeton 650 DSP w/ Celestion 80w speaker
Recommendation Thread please.
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