Problem with rock bands pins is there will always be people that want certain songs or era on them. Rolling stones, I would have liked to hear songs that don't just plain blow, and the first things you hear on the machine are Happy and Love is Strong along with that annoying BBC1 radio announcer. 'This is a STERN warning'. Retarded.
AC/DC people want other tracks from the band, same for Guns and roses on a lesser extent. My idea would be to dual purpose that mini USB for updates to upload whatever songs you want on a cheap 2 or 4 gig drive in there. I don't know if they'll be doing that anytime soon.
With movies, you don't have to worry about how you 'liked the old stuff better', you either liked or didn't like the movie. You don't have to play thru a mode on a song that annoys you just to get a better score, unless the song in the movie was annoying.
That said I picked Pink Floyd. But I think that would be terrible for a pin as well because depending on the song, you would have to have a 7+ minute mode. Gotta play thru that Welcome to the Machine.