I wouldn't worry about the calipers and rotors if you are a Novice track driver.
However once you move up you will want a BBK.
The Stoptech ST40 has been tested over and over and is stock on most Porsche 911s so the range of pads available for it are enormous and relatively inexpensive.
We use the 328mm Kit on our Spec86 Cup race car and Project BRZ track and street car.
Pricing is very reasonable at about $1600 shipped and they are designed specifically for the BRZ/FRS including Pads, Lines, Calipers and Rotors. Hit us up if you want to talk brakes or suspension.
sales@azpinstalls.com
-mike