Ok, a late update on the car:
She is now 4.8 years old and has 107.000 kms on odo.
Since I have the M2 and my other toys for summer driving, she now only gets travel kilometers and winter use. I'm still in love with her, enjoying the very powerful yet economical engine and the smooth transmission. I've never had another BMW which drives like the first day after this period of time. She will be the first BMW I'll own for a whole model lifecycle. Yeah, shes that good!
Since I still love her, I've recently pulled the trigger on the M-Performance Active Sound exhaust system. Not only because of the artificially generated sound (BMW did a good job here), but for the 6% less backpressure (helps with the M-Performance tune) and of course the looks.
Check it out: