Torquing the lugs properly is a huge thing. The most important thing is to get them all near the same. I use a torque stick and air gun.
Craig,
That would be more a characteristic of the pads not the rotors. If they don't warp they are good rotors.
How much do the Raybestos Rotors Run? I think I've warped a set or Cross Drilled & Slotted rotors. Do they make them for the rear too.
-Andy