All the talk about "Arriving Somewhere" had me thinking how folks would rank the 10+ minute length PT songs, so here's a (mostly complete) list of them:
No Reason To Live, No Reason To Die
Yellow Hedgerow Dreamscape
Radioactive Toy (just barely, at 10:00)
It Will Rain For A Million Years
Up The Downstair
Burning Sky
Voyage 34 Phase I
Voyage 34 Phase II
Voyage 34 Phase III
Voyage 34 Phase IV
The Sky Moves Sideways Phase 1
The Sky Moves Sideways Phase 2
Moonloop (Improvisation)
Waiting (Phases One & Two)
Mesmer III / Coma Divine
Metanoia I / Intermediate Jesus
Metanoia II
Even Less (Full Version)
Russia On Ice
Buying New Soul
Arriving Somewhere But Not Here
Anesthetize
Time Flies
Of these, some of my early favorites are "Burning Sky " and both parts of TSMS, but later on, "Russia On Ice" and "Anesthetize" are some of their best.
The best Porcupine Tree song is clearly the 40 minute uncut version of Moonloop.
You know what... that is a completely valid opinion to have. I have a CD-r burned with the full version of "Moonloop" with the alternate version of "The Sky Moves Sideways", and it's 74:49 of great music.
-Marc.