Best standard car sound system?

[S8QUATTRO]

What is the best standard car sound system you've heard?

I think the one in my 2006 330d coupe is standard Bmw professional, but the sound quality is fantastic..
I wonder who makes it for them?

Other good standard systems I've heard are in the First gen Lexus GS models, the Audi A8/S8 D2 models and the first gen Mercedes CLS

Excluding upgrades like B&O or Harmon Kardon.....what's the best standard set up you have heard?

[S8QUATTRO]

Hiya, I meant standard as in not a cost option upgrade...the old Audi s8 I had came with Bose kit and it was really high quality, even better than some newer cars today...and it was a 2002