I did a couple, with different settings. The first is based on 50 songs chosen by playcount, 4 second sample, and max 6 simultaneous. The second is 100 songs chosen by rating, 6 second sample, and 10 simul. And both end, I think, on exactly the right note. ::)
I need a music icon.
edit: I'm running a third. 100 songs, by playcount, 4.5 second sample, max 3 simul. I think this'll be closer to what I'm looking for, tho it'll last 2.5 minutes.