I have the same radio and also considered changing it…. But I was told I would lose the front and side cameras and a number of the speakers - it would cost about £1k
or…. I could keep the front camera for about £2k….
what I’ve ended up doing is connecting my phone via Bluetooth and use that to stream music and/or radio from apps on the phone through the Vellfire speakers. I also use my phone with Google maps for sat nav.
This leaves me with the full theatre sound that I can use with the built in dvd player or, if I want to use Netflix I use my iPad to view it and connect it via Bluetooth for sound.