That was a pretty good guess, I'd say 80% for movies/television. I did have the same thought about keeping the mains as regular speakers so I could use it as a music listening room. But realistically most of the time I listen to music it's in my project studio, which will no longer be play dual roles as a bedroom. I also plan on eventually building a library/listening room.
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs