I hate to say this about an Opeth song - but Dirge For November SUCKS. It starts off very nicely, but when it hits the growling and distortion it drones on in a repetitive, and very agitating, way. Then when the acoustics come back its boring...and it goes on too long.
BAD SONG!!
A while ago I would have said Nectar as well, but it grew on me and I love it now.