If the ordinary E92 M3 is not good enough the perhaps you could settle with a E93 M3 convertible? Frankly I can only see one reason for choosing the convertible over the ordinary M3 and thats because you get less insulation between you and the gorgeous engine sound, in all other aspects the convertible has to be worse. But the M3 4.0L V8 do have a very sweet engine sound...
I found the video via autoblog that stats that BMW had to unveil the car because of substantial leakage of photos of the car.