The PT DVD is spectacular - excellent performance, sound & picture. The camera work and post-editing is quite innovative and edgy, but doesn't get in the way of the music.
Funny moment at the encore when Steven Wilson breaks a guitar string just as he's starting the acoustic section of "Trains"...his "we'll just edit this out in the DVD" comment is priceless.
I agree with the rest of the posters...although "Deadwing" has some good stuff on it as well, "In Absentia" is a beginning to end classic.
Check out the bands "Seiges Even" (The Art of Navigating by the Stars album) and The Flower Kings (Stardust We Are, or Sum of No Evil albums) for more great prog!