I don’t have much experience in high-end luxury cars but I have owned a spectrum of brands from European,domestic and Japanese manufacturers.
Honestly I have never been impressed by a factory system. The H/K in our older Mercedes was a joke. We all know Bose is a gimmick. I’ve heard the Fender systems are pretty good but I’ve never had the chance to demo them.
The best I think I’ve heard is the Logic 7 in BMW.
What are some of your favorites?
Tesla model3 is very good, especially for the fact it’s included in most models for no extra charge. It may not have the fancy brand name hookup even though they allegedly used some B&O engineers, but it has the audio chops where it counts.