If I'm not mistaken the Express is limited to 16 bit not to mention optical connectivity. The Airport Extreme or the Time Capsule with a built in Extreme has a more than ample bandwidth.
I'm using my Extreme with an ethernet connection to a Mac Mini. The Extreme transmits Pure Music up sampled 24/96 to the Squeezebox.
I'm using my Extreme with an ethernet connection to a Mac Mini. The Extreme transmits Pure Music up sampled 24/96 to the Squeezebox.