I recently had some issues and "fun" with this mess. I ordered a set of front rotors and pads from Dynamic Friction Company and did the whole geo-spec coated rotors with 5000 series pads. They did okay for about a week and then the brakes started to do the steering
wheel shimmy and slight pedal pulsation when slowing down over 50 mph. I then tried to burnish them in since I only did light break-in such as you would do with a new car and that didn't work. After the burnish process, that didn't work, was not worse but still there. I contacted DFC and they informed me that I could have a bad rotor. Well, I have a 80 mile round trip commute and two small children I don't have time for returns and/or get them re-surfaced.
I then went to EBC and got the stage 1 rotors and pads. They are more expensive but so worth it. The break-in process is long, first 100 miles you have to be gentle on them like a new car, then drive them normally but not aggressive. After 200 miles, you need to carefully do the whole "burnish" break-in and do the 5 repeated 60-20 mph brake application and then let them cool off for about 10 minutes or so afterwards. Should be driving and stopping like a new car.
Thanks for reading all of the his crap even though you probably didn't care to know the specifics but would hate for you to go thru what I went thru trying to find a decent
aftermarket set up. I would go with EBC.