Hey all. I just got my 03 accord coupe and was wondering what are the choices for an upgraded stereo. I heard of a soundsouge or whatever it is called where you can add an AUX input. My question is has anyone tried it and how does it sound?

My other questions is, the compartment below with the door......is it possible to put a Headunit, like an alpine there and retain the door. I really like the door and it would be awesome to put a HU in there and hide it behind the door. Oh, my car is V6 EX without the NAVI. Thanks