in general the standard m3 is pretty good though, no-one can argue with that. this isnt really comparing apples with apples though as there are too many fundamental discrepancies between the two engines and also the type of person that owns them.
the yb is not unreliable though and is certainly not 'cheap plastic power'.
dont forget that they cleaned up in the touring car arena in the 80s to the point where rules were put in place to outlaw them. the poor e30s just couldnt keep up!!!(maybe that would be a better comparison!!!!!!!!)
anyway sorry for the hijack!!