I'm about to purchase a pioneer double din touch screen head unit for my canyon. I wanted to know are there other options for a gps control box or could another gps be connected in anyway. If I'm going to have to spend $400 bucks for a gps unit I'd rather have one I can move from car to car if I need to. I'd love to have it built in and keep the dash clean but really don't wanna pay $400 for one I can't use in another car.