well a lot of the bands that I would have suggested have already been mentioned, but I will second a few and mention a few more (sorry if this is Doom Metal information overload, but it's my favorite genre of metal)....
~SATURNUS - Paradise Belongs to You.....a great, emotional deathdoom album...beautiful heartfelt lyrics...I also like their other releases 'For Those Loveless Lonely Nights' and 'Martyre'...Martyre definitely takes some getting used to (the vocals mostly) especially if you have heard PBTY, but still a great album
~ESOTERIC - this band is just fucked up! Kind of Funeral Doom, but with different samples and noises mixed in....I was listening to Metamorphogenesis one night when I was at home alone and I got so freaked out that I had to turn it off.....it's one of those bands that just makes you uneasy....
~PARAMAECIUM - (Christian!!) Death Doom from Australia....some of the ugliest riffs I have ever heard....
~OFFICIUM TRISTE - Get 'Ne Vivam' great death doom
~CORRUPTED - from JAPAN....great doom with lyrics in Spanish!
and to give my local scene some props...ASUNDER are an awesome band from Oakland, CA....along the lines of Crestfallen era ANATHEMA but their newer stuff is heavy, heavier, heaviest....go to
www.lifeisabuse.com (the mp3 section) for some samples
GRIEF - Misanthropic, selfhate sludge.....there's also an mp3 on lifeisabuse
and for some reason Finnish bands know what the hell is up with doom metal:
~THERGOTHON - (also check out THIS EMPTY FLOW which has two members from Thergothon....along the lines of THE CURE - Disintegration)
~UNHOLY - all of their albums are worth getting but my favorite is probably 'Rapture'
~SKEPTICISM - straight up funeral doom
~SHAPE OF DESPAIR - Shades of.... is also a great pick....this album is all written in 3/4 timing...Funeral Waltz anyone? Their newest album (Angels of Distress) is of notable attention as well)
~RAPTURE - not necessarily doom metal but still excellent. I've heard a lot of people compare it to earlier KATATONIA....gHas (or actually had) one of the guitarists from SHAPE....
Now go out and buy, buy, buy!!!!
P.S. 1) TRISTANIA are NOT doom metal (more along the lines of gothic metal)
and 2) They suck!