What do audiophiles listen in their cars?

I'm with Mechans on this, car interiors are too noisy for me to even consider giving a hoot about listening seriously. My Acura TL's factory system is quite good enough for the sort of listening I do while commuting.

Snofun3, no reason to get reactionary about "sniffy" attitudes. It's really simple: if you like to listen to classical music (at an overall reasonable volume) the lower dynamic range of the music is drowned out by road noise even in a quiet car. You're always turning the volume up for the quiet passages and turning it down on the crescendos, too much of a pain to bother with. Ford's OEM sound systems once had a compression switch to ameliorate this problem. Sure it detracted from the ultimate audio quality, but it made listening to classical music on the road pleasurable.