I think M5 is superfast. To stay neck to neck with overly powerfull monster like SL55 AMG is no small thing. I dont think 8.12 vs 8.13 is that big of a deal. Because if you look at the Hockenheim track BMW 5 has the SL55 beat soundly. :flag:
Also one cant forget the fact that SL55 AMG cant take a family of five in luxury and comfort to a fancy resturant. This is why I love M5 and no SL55 AMG can touch it in that regards:nono: . It is like having your cake and eating it too.