I wouldn't do it. At all.
Brake balance is a delicate matter, and like Jameson said, the aftermarket tests this out extensively...
the only other "beefy" option is through Stoptech directly, and that's still a 6/4 design (but costs $6-7k!)
also requires some trimming, so kiss warranty items good bye:
I honestly think the MBP looks plenty nice on the rear...
