for all those who mentioned fuel economy as a factor..... efff offffff. The only reasons you would care about gas mileage are
a. You cant afford the extra 150 bucks a month on gas!!
b. your a enviro friendly, green, tree hugger
c. gas mileage is a priority as a purchase decision
If you are either of these or think gas mileage is a priority then the M3 or any GT performance car should never be a thought... buy a prius