[pothole]

Well, the key question is the price-to-longevity ratio. If they cost three times as much, they're going to need to last three times longer. I'm far from convinced that's the case.

I always buy proper parts when I think they're worth it - bought a Porsche water pump and proper Behr rads when I did my cooling system overhaul last year. But regards rotors, I'm with thstone: expensive rotors is money blown. That's been my experience on and off track.