I have to add that my experience with the Campy NR was that it was the slowest shifting RD I ever used on my bikes. It also required the most amount of lever travel to overshift so the chain would properly shift on to the chosen gear.
Yup, the NR is built like a tank, beautiful and very well finished, but I think it had alway been coveted by riders, taken in by a lot of hype that always surrounded the old Italian brand.