I've found that if you want to demo a sub, movies tend to work pretty well too ..
There's lots of additional details at avs. This link may be of some use to you.
http://www.avsforum.com/t/755493/th...u-ray-movies-with-bass-thread-with-waterfalls
Otherwise, I tend to listen to a lot of metal, and not much of it hits too hard on the sub. I sometimes listen to Blues and Jazz, and they too don't really hit the sub. The Stone Rock Band "Electric Wizard" does tend to hit the sub pretty hard, but, not as hard as many films do IMO.
Occasionally, I'll throw on some Hardstyle Techno, and as a general rule, that has lots of heavy deep bass, but again, in films they tend to push the envelope more in terms of bass.