if you do get the 3200BT look into this mod. I read about it on another forum, and posted some more pics on here
I went through and added a rear USB to the head unit, it wasn't too hard. Took about 45 minutes. remember be careful and take your time.
1. pull face off the headunit. (there are about 8 screws, and a few tabs to remove it)
2. cut USB extension cable and strip ends of wires (on both ends)
this one is used to check positioning of wires, just plug it in and check what color of wire goes where. make note, so you know where to solder what.
3. with 2 cuts of the tin snips and a screw remove, I was able to fold up the plate covering the USB board.
4. after buttoning it all up here is what the back looks like.
works like a charm!
I have the ipod cable with both usb and 3.5 to allow video to play. I routed the USB behind the deck and the 3.5 is stored in my ash tray for easy access when I need to play videos. the 30 pin connector sits in my arm rest.
NOW I am happy with the headunit.