First time reading this thread, and I have to say the introductory posts from 13 years ago are very educational. Never thought of Supertramp as prog, though I do see why the Moody Blues would be included. I kinda grew up in that era, when the cool kids at school were swapping Yes, Genesis and Rick Wakeman (and the very cool were into King Crimson, Frank Zappa and Captain Beefheart). Having been primed by Wakeman, I always thought of Jeff Wayne's War of the Worlds as a continuation of that kind of themed concept album, but I could just as easily make a case for classifying it as grand opera.