To above post... Yes you would assume that the gt3 a 150k track built car would have a more responsive engine than a car that costs half the price but I doesn't. The most advanced part in the m3 in the engine. Bmw, atleast up until now, has been known for investing a lot of resources and money into developing some of the most advanced engines in the world and not just for M cars. This is why bmw engines have won do many awards year after year. More than any other car maker. That is what bmw stands for Bavarian MOTOR Works.
On a side note, I recently drove a 2011 cayman s and I was SERIOUSLY impressed not just with the handling but the engine too. The engine was more responsive than my c2s and sounded beautiful.