Although they're not out yet, Performance Friction pads are very rotor friendly in my experience.
I bought a set of Euro floating rotors for my e46 M3 (like what we have on the e9x) and had them cyro treated. I then ran a set of PF-Z rated pads and three sets of PF-01s and didn't wear them significantly. The cryo treatment might have contributed as well.
The point is that if you buy the right equipment, even if it's more expensive, you might save money in the long run.