I will come back for a more detailed reply when I have had time to listen to these pieces of music. (Currently typing in a break at work.)

At present, what I'm thinking I'll do next year is let you and others nominate this kind of music, once we get a safe criteria sorted out (something like "programmatic music/ music with no lyrics but a strong narrative design/ check with Morbane/seekingferret") but insist that everyone's requests must include at least *one* song that does have lyrics, just in case writers get cold feet.

My remaining concern, which I'll refine (and possibly solve to my own contentment) when I've listened to the pieces, is what background information you already had when you first encountered them. I imagine the Koyaanisqatsi piece can be treated as a music video analogue, in that the accompanying imagery informs the narrative strongly and sufficiently, and that might be all the background a writer needs; but I wonder whether it would be significantly better as a writer to be familiar with Camille Saint-Saens' other works, or know the background of the Grand Canyon Suite.