Top 1: (an entire album) Isis - Panopticon. I listen to it obsessively, over and over again, and I can't single out any particular song because they're all amazing :cool:

And in general, according to Aimpro statistics (from around mid-autumn):

Isis - Altered Course
Isis - Wills Dissolve
Graveworm - (N)Utopia
Candlemass - Crystal Ball
Isis - Backlit
Isis - Syndic Calls
Flёur - Be My Meaning
Candlemass - Solitude
Iron Maiden - Afraid To Shoot Strangers
Death - Misanthrope

Isis - So Did We
Megadeth - High Speed Dirt
Isis - In Fiction
Death - Crystal Mountain
Megadeth - Hangar 18
Megadeth - Addicted To Chaos
Megadeth - Train of Consequences
Therion - Lemuria
Flёur - Emptiness
Isis - Grinning Mouths

The entire Panopticon album is included)