It is difficult for me to guess from my very limited M3W experience but I could well imagine that hearing the stereo music system would become very difficult at speeds above 50mph.
i be almost a decade in AudioMobile industry, so i can say in every cars you can listen your music in acceptable condition, but that come with a price and sacrifice in term of price and/or usability example fit 16"X9" speaker in a M3W should be possible but not so simple and will took precious space in the car ...
So the question is more : are you ready to paid the price than other things
