Walter,
It is a foregone conclusion that a front brake upgrade precedes one to the rear. My question was rather to determine if anyone found it even necessary to mess with the rear OEM system at all. i.e. is it adequate for all high perfomance applications? Most of the people I talked to say to go huge with the front brakes but no need to touch the rear.
Point of fact, I really hoping to find someone who had made that upgrade to the rear to get their perspective.