I agree the performance is probably the most impressive over 100, ive been in an m6 and it went in 4th gear like an m3 would is second gear lol.
I was thinking that a lot of what you hear people spending money on whislt owning one is just ordinary stuff like tyres/brakes/ordinary servicing ect which is obviously expensive on a car like this and i fully understand that. I spose my concern would be owning one without a warranty that if it starts going wrong and needing repairs its no doubt going to be very costly. Its easy enough to check service history and condition of tyres/brakes ect out when looking at a car weither it be from bmw or private seller