i've heard people rave about "The Night and the Silent Water", but i still think its better than anyone has said. its probably one of my favorite songs, its one of opeth's most fluid songs. the intro is just awesome, and towards the end when the whipsered vocals come in, i always get chills, and the lyrics are some of akerfeldts best in my opinion.
and i also love "The Amen Corner", like much of you. the opening riffs are so dreary, i love it. and you gotta love those lyrics.