I'm not that picky when it comes to desktop audio player. Typically, I just use whatever audio player that comes with my Linux distro. As long as it plays all of my audio files (with the right plugins of course), I'm good. Until most recently, when I've tried those iTunes replacements that I wrote about a while ago, I've discovered Songbird, and it quickly became my favorite audio player.

Getting to know Songbird
As described on its project website, Songbird is an open-source customizable music player that's under active development. The project’s main aim is to create a non-proprietary, cross platform, extensible tool that will help enable new ways to playback, manage, and discover music.

More Here