Tokyopia.com has an article where the author argues that music is more important than graphics in games. He argues:
In going back to look at a few rare games that still fly, it struck me that the graphics have almost always dated horribly, but the music - almost without fail - still succeeds. At worst, old music elicits a smile. At best, a full on emotional connection that really enhances the game.
To support his claim, he gives a couple of examples of known games.
Click here for the full article.