Yep, the 13" PBR (Cobra) brakes are WORLDS better than the Nightpager kit (which is 12.6" rotors used with calipers designed for a 10.8" rotor!)
ARZ's kit is still the top shit, though

I just built the Cobra kit to allow for better than stock braking, at about 1/2 the price of ARZ's kit.
Granted, I'd love for someone to upgrade my kit to the 2000 Cobra R 4 piston Brembo brake calipers, and test against Andy's kit. I'd love to see how close to his performance my kit gets!
Andy's kit (ARZ Performance) is THE benchmark, in my opinion.