Porcupine Tree - Signify (1997)

Although not especially old, its still a classic in my book. the album Signify from one of the best band's ever to come out of the British isles is widely considered as one of the best albums ever released in what i like to call "the sub-Pink Floyd genre". In a interview given in 2007 They said this about the album:

"It was an result of a gathering of thougts in the band, we wanted to make something that would outlast us. We wanted a testimony"

And what a testimony it is. Porcupine Tree [allmusic link] is playing with many genres in this amazing album, from jazz, to psychedelic rock to prog. It's all here to enjoy.

Tracklist:
Bornlivedie
Signify
Sleep of no Dreaming
Pagan
Waiting phase One
Waiting phase Two
Sever
Idiot Prayer
Every Home is Wired
Intermediate Jesus
Light Mass Prayer
Dark Matter

Personal favorites on this album is the tracks; "Every Home is Wired", "Sleep of no Dreaming" and "Dark Matter". A great album for anyone who likes Pink Floyd, early Genesis or Prog in general. Porcupine Tree just released a new album which were given good critics, check that one out as well!

Allmusic link to the record
Official website