Joss Whedon, the writer/director responsible for the worldwide television phenomena of "Buffy the Vampire Slayer" and "Angel," now applies his trademark compassion and wit to a small band of galactic outcasts 500 years in the future in his feature film … see full wiki
Compared to the Firefly series soundtrack, released (online download only) by Fox, the Serenity soundtrack is poor.
The Serenity soundtrack is fine in the movie as it reflects the tension and highlights the action. But as a soundtrack to listen to it's terrible. It sounds like it's from a grade B horror movie. This isn't music, it's orchestral noise.