BBK FTW. At higher skill level, you are able to take the car to limits that most white/green level group drivers won't. I've learned to be prepared, so you don't find yourself taking long way around and eventually going BBK after spending money on multiple pads, rotors etc as you become faster. Also if you will be tracking a lot, it is definitely worth. I have had to back off later in a session just because of fade (awful when u know u can push harder but not necessarily safe). My car as now gotten to the paoint where I've pulled the trigger on AP racing breaks especially since I have upgraded my tire/suspension setup.
Btw, Richard the k-dubs are amazing. Dropped almost 5 seconds on my lap time at spring mountain after I installed them along with my RS-3/18" TE37 setup. M-World is the real deal. Thanks again.