What do audiophiles do in their cars?

My wagon came with Burmester. I have to turn the bass way down because the system was evidently tuned by hearing-impaired German teenagers.

My Acura RLS came with a Krell sound system. Pretty good. Seats  are comfy and it's quiet. A nice place to listen to music, especially new music. I'll listen to the same new piece over and over before critical listening inside. In my 911S I'm happy with the engine sound

I used to only listen to older R&R in the car since most recordings aren't that good anyways..  it all sounds like crap in comparison, so I tune into a university station, playing classical without a lot of talk and NO ads. Good stuff. I need to send them a donation. 

Mostly just the factory in our cars, as many have said, they are pretty good now, and much of the car's computer system is run through the head unit, so it can be a pain to change.  But....

I have a classic convertible that has a massive system to make up for the poor speaker placement options and huge open area.  Just went with power, didn't really concern myself with quality just trying to overcome the awesome engine noise (Pontiac 455) and open air noise.