I'm looking to return to the Aston fold and while it's not the end of the world...can anyone recommend an aftermarket conversion for the Garmin unit to bring the infotainment system a little more up to date.
You want to replace the 2013> Garmin nav for something else?
Other than portable items, the only effective way I can see is the Volvo AV in break-in box or Denison unit. Then with an AV in, any RGB sat nav (Alpine/Kenwood/Clarion etc) can pipe into it.