The Silvermine rear brake kit is pretty nice, I have it myself.
The one thing that nobody mentioned (I don't think) is to make sure whatever you decide on, there are plenty of pads available. This is one of the main reasons why I decided to use the MM front Cobra kit plus the Silvermine Mustang kit in the rear, SOOO MANY choices. And the front can easily be upgraded to the Cobra R Brembos if you needed that extra 2 pistons and bling. I figure 13" front and back should stop the car plenty fine. Throw in a larger master and adjustable proportioning valve, it should work ok. Not too expensive, but is easy with upgrade potential.