If it were remotely possible to disprove the BMW motto of, "The Ultimate Driving Machine", they wouldn't be allowed to say it. Trust me, if you have the $$$ and you want the BEST 4 door sports car on this planet, you pick up an M3, period.
My favorite feature was the perfect balance of power and handling.
I would make power seats and better stereo standard equipment. As well as an adjustable steering column.