how the heck does that puppy do in the car?

wondering about the audio diff between mp3 vs wma- thinking of going this route instead of the ipod - I own a 8120 (nice btw) and tried the chicks ipod and was not blown away. usually just play disks. I do not have the b&o btw. too bad one can't use BT for audio in addition to the phone, that would be hot. thanks