I just bought and installed USA-Spec PA12 and couldn't be happier.
02 325i Touring HK Business CD w/ 6cd changer.
Install is a piece of cake on the touring. I haven't run the cable up to the front yet (a spring job I think) but the unit is performing flawlessly and seems to do everything I need it to.
'85 E30 325e
'90 E30 325i
'02 E46 325it
'03 E46 320i
'96 Volvo 850R