WAV doesn't allow tagging and is the audio file stored bit-for-bit (i.e. big file sizes). Lossless compression stores exactly the same information but allows tagging and saves space. I store my library in Apple Lossless.
Storing metadata about the file like artist, title, album etc - WAV can't store that data in the file itself, other file formates (inc Apple Lossless) can.
Im after a gd dock for the ipod and was cosidering either the 'BOSE sound dock portable' at 300 or the 'B&W zeppelin" at 400. I've heard the Bose in action and to be honest it sounded better than my setup at home.
Is there much difference in sound quality between the Bose and the B&W for the extra 100?