the nav unit i have allows for a mp3 to be connected to it, i dont know how, but i know u can do itb.) i really, really, really dont want to lose the iPod connectivity and control through the deck, as well as the sound quality (i dont know if Eclipse has a deck that does the GPS/DVD nav, is double-din and supports iPods; however the AVIC-D1 has an adapter to connect an iPod to it, ive heard that its crap though and doesnt allow you to control it through the deck)[/b]