http://www.autostyle.co.za/prodview.php?prod_id=18245
Looks good...
Why do you want the USB at the back? What if you want to add a song?
I would get something with a front USB port. That way you just keep a couple of flashsticks around.
Reason nr 1. - I think it'll be neater to run a USB cable somewhere out of sight, like the pocket for the car manual.
Reason nr 2. - If you look at the S2000 front console, the radio is hidden by a radio door, if I have a front usb port, the radio door will have to be open the whole time... getting in the way, and making the radio visible to outside eyes.. You don't know how many security guards are shocked at the 'sports car' with no radio