I've been revisiting The Incident recently (before, I'd only heard it once, and that was around few months ago), and Disc 1 is really growing on me. Still not sure how I feel about Disc 2.
As far as Disc 1 goes, though, I'm really enjoying it. I'm almost certain that The Incident will end up in my Top 10 Porcupine Tree songs, if not my Top 5. Other highlights so far include The Blind House, Drawing the Line, and Time Flies.