3 Albums I'm surprised weren't mentioned:
Dillinger Escape Plan's Option Paralysis
Deftones's Diamond Eyes
And Enslaved's Axioma Ethica Odini
I also thought the Long Procession by Amia Venera landscape was pretty good as well.
Oh yeah, Rosetta's a Determinism of morality was really good.
My favorite was Option Paralysis (not sure if it's considered metal, I'll let it slide if you guys do), and it looks like I have a lot of runner-ups
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Edit:
@rehabitat, sorry Chrome on my mac is being difficult and didn't load the video so i didn't notice it was. I agree completely and Billy did a great job on that album. I really hope nothing bad happens to any of them because I want to see what happens when they have the same line up for two releases.