Actually had to replace both a year ago; not the fault of the calliper though, more the fact that when the wheel got ripped off behind some armco it broke the casting.
Use hubs and rotors from rally design, have had a couple warp and one break violently under heavy braking (although it was well worn).
As for pads, off the top of my head I think I have used Hawk, Mintex, Ferodo and Willwood. All were fine, and I couldnt really say much to differentiate between them.
TBH they have stood up extremely well to the punishment they get, and am most likely going to go for Willwoods on my new car, although probably with 1 piece discs