Concubine is just fucking amazing, so much awesomeness in such a short song. Homewrecker is sweet too, and so is Eagles Become Vultures.
Nevermore - Born, Inside Four Walls, and The Heart Collector. But their whole discography is really, really solid.
Ensiferum - Windrider, Little Dreamer, and Slayer of Light
The Gathering - Hard to say for all time. Currently I'm really digging Shortest Day, but maybe because it's new, but it's also totally awesome. Also Illuminating and Probably Built in the Fifties.
Soilwork - Seeing these guys in October at Jaxx, hell yeah. Anyway, The Chainheart Machine (title track), Steelbath Suicide, and Like The Average Stalker would be my all-time favorites. Though every era of Soilwork has a bunch of really amazing songs.
Norther - Death Unlimited, Mirror of Madness, and Blackhearted
Kalmah - Heroes to Us, Withering Away, and They Will Return. This will hopefully change when I hear The Black Waltz as soon as it's delivered, though.