You are not bound to the small 7 inch screen.
Double dins come with 10 and 12 and even 13 inch screens.
This is an example of the available size not a recommended brand.
I would never buy anything less than an android radio head.
Too many fine things like offline maps and weather and online waze and the most excellent Sygic maps.
50,000 apps of all sorts. Don't pass them up.
Posts 186 and 379 in my signature thread shows a 10.1 inch in a Vegas dash.