as for options, I am not sure. My 07 came with it and I can say for the most part I like it. The nav feature isnt very user freindly but gets the job done. I am looking for a camera that will use the screen from the raidio but no luck yet. Also no external input for mp3 player.
Thanks for the input. I'm adding REC/NAV to the truck. Found the Lock Pick for the camera input and am trying to decide on what camera to use in the back. NAV2GO here may be able to help with that. There is an iPod adapter that will work with the REC/NAV unit and with the right adaptors, you can control it with your steering wheel buttons.