ABOUT MAZDA CX 5 RADIO UPGRADE

If there was A much bigger OEM Mazda selection then I might Select that, but so far as I am aware, there isn't. So I'm looking for tips, from people who have adjusted their headunits or who have an even better comprehension than I do (not very hard) of what the implications will probably be. I am satisfied to be owner of this head-device, almost e