Sank, yes summertires are on. Even when no disturbance from studded tires, I need to go to Track-mode to hear exhaust sound - but then it is great.
I understand that all M40i owners are very happy with their cars, but since I have two cars, mileage on my 35i prevents me from buying M40i - I will have to get comfort in the looks (and sound) of my Klappenshalldämpfer.
Tips: going to Italy you should wrap your transponder in aluminium foil, when away from car - then the thieves can't steal your signals and drive away.