Lots of hate against the OP here huh?
He's just pointing out some objective results. The 135 is a cool car. News alert: you can mod it and make it fast.
The M3 is cooler, and can probably be made faster if you want to mod it. But at the end of the day the M3 is also more luxurious, more practical, and more comfortable. You pay for it but it's worth it to some people, like me. For others, their money is better spent on the 135 (or 335). It's all good.