Recommended systems - components for Car Stereo

I am looking for the best recommended components for a car stereo. I am after quality not quantity. What would be a best fit for a single CD playing unit with a great midrange good mid bass and clear highs. What speakers would be best. It will be installed in a 2 seater sports car with a cloth to, presently with full range speaker in each door panel and a sub speaker installed in between the two seats (BMW Z3). The sub speaker "farts" at low volumes ghich is either to the poor factory supplied cd player or over zealous use by the previous owner.
Do not want a flash display or light/functions/bells and whistles just great sound.

Price range up to $1300.
Any suggestions from pratical experience would be great