Personally the music dosent bother me in the slightest, if you dont like it the turn it down, simple, which is what a potential employer would probably do.

Music on a demo reel is always trickey as its personal taste at the end of the day, and most people looking at them arnt there to listen to the music but to looks at the work of a potential employee.

With the cloth sim section I personally would keep it as a sepperate section as its a speciality, not a general animation technique i.e keyframing etc etc, Its like if your very proficiant in dynamics/fluids etc you wouldent put these in with general animation as it might be the thing that gets you the job if the employers looking for someone with that knowlage, all about playing to your stregnths.