I voted Morbid Angel.I think they are about as good as it gets when it all comes down to it.
I love Nile loads,one of my favorite DM bands.Vader rule too.Immolation are great(i know there not on the list),but there latest album is the only one that interests me immensely.I would have voted for Death,but i find them to incorporate more than just DM in to there style.
But for my favorite DM band right now,its definatley without a doubt DECAPITATED.I just cant find any other DM band right now that even begins to compare to them.There not just average at all,i think they are one of the very few DM bands these days that actually concentrates on all aspects of the genre.Especially when it comes to songwriting.DM metal bands can sweep pick at a million miles an hour,and while thats very talented,it just doesnt compare (IMO)to good all around well written songs.But not that DECAPITATED arent technical,just listen to the new album.Vogg,their guitarist is probaly my favorite player right now.He has perfect timing,precision,an incredible and original technique,and hes not OTT with any of it.
rant over.