The best thing in metal right now....

really? try "harnessing ruin", the epitome of crushing and very dark NYDM.

Naw, man... that title goes to a previous, more expansive-sounding work of their's, Close to a World Below. Or for more old-school, Incantation's Onwards to Golgotha or a Morpheus Descends album.
 
Weaker sounding? Immolation are more "brutal" than Neurosis, but quality wise Immolation have nothing on Neurosis.

thats debatable. don't get me wrong, I love Neurosis, but lately Neurosis have been making lackluster albums.
 
Lost Horizon, Deathspell Omega, Melechesh, Agalloch, among others. The Absence has mucho mucho potential. Last time I checked, Graveland was still fucking awesome as well.
 
Not really. Metal is only one element in their music, and it's not even the dominant element.