I have to say it is realy nice beng able to pop in a cd if you want to.I had my empeg in my truck all by it self for about a year.I put a head unit in a few months ago and it sure comes in handy when friends bring cd's i dont have in my empeg.I also have sirrus radio now and it is cool but i dont find my self listening to it much.I have the empeg going into the aux in on my panasonic and i use the aux out on the empeg for my onstar phone.my hole system seems to sound better now that im running thru the panasonic.if you go to a nice install place im sure they can find a place to put both head units.