I really haven’t seen many IMs for sale or that have sold. Mine is on the route, and I play 5-10 games every time I’m in that location, and I still don’t feel like I’ve got remotely close to seeing all the modes and features and I consider myself a fairly salty player. And in regards to the music and theme, I think that’s part of what keeps you going while playing. You feed off the energy of the music whether you want to admit it or not.
In re Munsters, I have to agree about the theme music driving me crazy. The only thing I’m hoping is it has a Dragula wizard mode that maxes out the volume with Rob Zombie Dragula.