My main vehicle is a Diesel Mercedes GL, a 5000 lb plus SUV, and I can mail order genuine front rotors from a Mercedes dealer for $57.92 each plus freight.
I've a hard time concluding that genuine Porsche rotors at around $150 each mailordered are of much higher quality if at all.
I just installed Zimmermanns on my 2001 Basic as I'm used to the gray coating thing and like the fact they're produced in Sinsheim where I've toured the ultra cool museum.
I believe I could have gotten cross-drilled Zimmermans so my Basic would look almost as cool as an S but didn't.
Otto Zimmermann Bremsscheiben GmbH -
The Porsche rotors and pads were significantly easier to change than the Mercedes and each Porsche pad gets a sensor while only one of the four Mercedes pads does.