Basically I want to upgrade my stereo system but I need suggestions on how to do that.. Cause no one seems to carry the car kit or stereo kit?

I have a quick (weird) question. I am about to pull the trigger on a 2012 Executive trim level car. It's fully loaded with Nav and everything else but when I put the car into reverse I noticed the picture that appeared on the screen seemed to be.. how should I say... computer generated, like it...