Still a long way to go with my list, I've listened up to Six Degrees of Inner Turbulence. I will definitely have a list ready by the deadline. Speaking of SDOIT, it's somehow managed to hold up even better than I remember, which is impressive considering it's my favorite DT album and my second-favorite album of all time.
Also, the title track is one song. I get considering something like Porcupine Tree's The Incident as a bunch of separate tracks, but SDOIT was intended as one song and flows together as one song.