I have done many brake jobs on my vehicles and others, so I will offer up my :2cents:
For starters, I typically use the cheapest pads and rotors that the parts stores carry. (autozone or advance)
I just dont notice twice the life to justify twice the cost. And I can get 60-80k miles out if the cheap ones on the cars, and ~30k miles out of them on my truck, which sees a lot of towing and alot of plowing. And plowing is far harder on brakes than towing. LOTS of stop and go for not many miles racked up. Plus, it gets me in there more often to look at other things that tend to get neglected, like u-joints, ball joints, bearings, etc.
And even after 30k miles the rotors are difficult to remove. Not sure I would even want to wait any longer if a good set did indeed last 60 or 70k.
As to rotors, I always replace them. Just not worth the hassle not to. Buying cheap ones, they are darn near at minimum spec anyway. So turning is out. One time, Dad decided to put pads on his 1998 ram 1500 and not replace the rotors like I advised. They werent too warn, and smooth. After another 5k miles or so, the rotor split in two along the cooling fins. (inner surface broke loose from outer surface.)
I have NEVER had any issues with anything I got from autozone or advance. BUT I WILL avoid NAPA brakes like the plague. Everytime I have used them, the squeaking never stops. My 2001 saturn SL1 I put pads on about 3 years ago (55k miles). They still squeak and have since day 1.
Same story on my 2003 silverado when I had it. They squeaked from the day I put them on until the day I replaced them with duralast brakes.