I wouldn't buy anything that is Fusion brand personally, gotta be shit.
Also, like others have said, just buy one that lets you plug your ipod into it. They have them with a plug in the faceplate, and some with harness that you can run from the rear of the unit to the glovebox, center console, etc.
When I say harness I don't mean a headphone jack that runs to the receiver, I mean a full blown data cable that allows full control of the ipod from the headunit as though it were the ipod itself ( without burying it in the headunit...).
It sounds like you may be new to car audio, and if you're just looking for something decent, check out the ipod control-capable head units from Pioneer and Alpine, they're both quality brands.