I bought a 2001 F350, and I want to get rid of the broken stock radio that will change volume and turn on and off at random. I'm looking at upgrading to a touch screen navigation unit, and debating if I should get one with a fixed screen or a motorized screen. The motorized screen versions have bigger screens, full size sd cards instead of micro sd cards, and you can have the screen tilt for better viewing. I have also heard the theory that the screen covering the sd card and cd slot tends to reduce dust issues. On the other hand, the motorized mechanism looks like a lot of potential failure areas, particularly in a dusty/ dirty work truck. Has anyone had any of these stereos that can comment on reliability?