iTunes lets you build a library of as many of your acquired or ripped MP3s as you have time to add, with the option of making multiple playlists to satisfy your every mood. Want to burn a CD? No problem. Make a playlist, insert a CD into a CD burner, and click the Burn CD button on the upper right. Too much bass in that last track? Simply open the Equalizer and adjust to your taste. You can even listen to live streams when you want to hear something new. The only thing lacking in what is perhaps Apple's greatest application to date is the ability to change skins. However, you'll find that even without skin variety this MP3 solution is worth way more than its price tag: it's free.