If it were possible, I would go for automobile versions (doesn't exist) of Wilson Audio's Watt Puppy 7's (I think the Alexandria's are way too over the top), powered by Krell Resolution Amps...and a Linn Unidisk player in-dash (Aston doesn't have a Unidisk though it does have a nice Linn set-up).

If I had the exhaust of a Mercedes or BMW, I'd go for extensive audio modifications on my car, but since the exhaust sounds so sweet, a pair of Sonus Fabers playing Mozart couldn't touch it. So I'm not going to change anything :-D

But I'm just dreaming...