OK I have a Kenwood music keg currently installed in my 96 T4R which works great. However I am considering moving the keg into my 05, which has the NAV (which I obviously don't want to replace with a Kenwood head unit just to hook up the keg.). So it seems like my only real option is to use an FM modulator, but I am very concerned about being disappointed with it. Has anyone else tried a similar setup?