From "The Matrix" to "Tron: Legacy," these sweet sci-fi soundtracks are perfect for serious audio aficionados.

Over the years, there have been plenty of movie soundtracks and scores that have become ingrained in pop culture—and some have even eclipsed the popularity of the very films in which they appear.

Music is such an important part of moviemaking, to the extent that there are a fair number of films whose soundtracks are even better than the movies themselves. Even harkening back to the days of ...