I agree with Grab about Radio 3 in the car, something I lament (maybe I should trade in the Peugeot 106 diesel for something a tad quieter!). My Mozart piano concerto CDs are equally hopeless in the car, as is, I found the other day, Penguin Eggs by Nic Jones. I suspect that the excessive compression used by Classic FM is applied with in-car listening in mind. Sometimes it appears to be mismanaged so that you get an awful, squawky wall of sound, and sometimes you get the ludicrous sensation of a single flute or clarinet being much louder than a whole symphony orchestra!