[Turbobuick]

I'm not sure were you are going with this but in all the disc brake arrangements you have listed above the 13" rotors with PBR calipers are going to be FAR superior to anything else you have listed, and I know this from experience. "Raw braking power" is going to be determined by many factors other than piston size. Pad size, fluid dynamics, rotor size, heat, caliper size, all contribute greatly to the overall design and function. MC bore diameter has nothing to do with this and has to do with pedal travel and feel.

I'm no expert in braking, by far, but I have run the 1LE brakes, wilwoods and the 13" PBR brakes on a race track (road racing and drag racing) and will take a 13" brake with PBR caliper over the others listed, any day of the week and especially on Sunday!