the title track on deliverance is very good, and the album in general is by no means their worst. i would probably rank them thusly;edit: am i the only one who doesn't like deliverance by opeth? i love all their albums from my arms, your hearse onwards except that one (i do like orchid and morningrise too but i don't love them)
damnation > watershed > my arms, your hearse > deliverance > morningrise > blackwater park > still life > orchid > ghost reveries > heritage
i'm not really 100% sure about anything after watershed there though.