Good morning and happy Easter to all. I am thinking about upgrading my current Sony head unit. I am not very happy with the color and contrast of the screen. My question is if I decide to move forward with this do I have to rebuy all the "kits"....meaning wire harness, Crux interface that gives the ability to use the steering wheel controls. Or can I just buy a new head unit and for lack of better terms just plug it in. I would assume all I would need is new Metra dash kit.