At $450.00 IF it is in fact $450.00 for this kit, you are half way to a Wilwood front kit, and then you not only get the bigger rotors, but FIXED calipers as well which will not have any pad knock back, besides their even greater clamping force exerted on the rotor, and usually a greater choice of less expensive, high quality, race level pads than the factory SLIDING calipers.
The major drawback is the cost of the replacement rings for the lighter, alloy hat rotors if you stick with them over a cheaper solid (factory type) rotor.