Nice car, Thom!
A guy I worked for bought a new M3 Evo in 1996 (Euro: 321bhp, 6spd, 6 throttle bodies) and for some reason needed two new differentials within the first 9k miles. He was a mature driver in his 60s and didn't race the car. After the 3rd diff was installed, it was plain sailing. A truly awesome coupe.
Enjoy!