You should also get airfoil if you are using an airport express. It allows you to stream other music programs (e.g. Rhapsopy, Yahoo Music, etc). I spend the $5 monthly charge for Yahoo, download tunes at 192kb/WMA to "My Music" for free, and play it back through my stereo (thereby listening to it at higher quality then through streaming). I'm also looking at geting Xitel's inport, which would allow me to record whatever I'm playing through Yahoo back to my hard drive.