Just brought my new 2008 m3 cab home. Traded a 2008 P 911S cab. The M3 is faster and tighter with 19s and M drive. I am really juiced. Have had a 2007 P911 turbo, a bmw 645, and another P911S cab in the last 4 years, but this seems to hold its own with the turbo and beat the rest. More comfortable the the Porsche with incredible handling. M3 has satellite radio, something Porsche did not offer until 2009 and then at a very steep option price. And my insurance went down to boot!
Balance between speed and handling together with comfort which far exceeds Porsche.