25 years in the auto parts business taught me much about noisy brakes and dirty rotors.
Customers/users are hardly ever happy. I will give my opinions(couple anyway). Inexpensive.. but last. Clean and quiet. Friendly to the environment and the rotors.
Brake pad bonding was done on purpose(glued to caliper). Noise starts at the rotor surface and is transmitted and sometimes amplified through the hardware.
Smooth rotors(but not glassy), clean lubricated hardware(caliper has to move). Quality product. Rotos are lighter than they used to be, but yet most not ventilated and are doing sometimes 80% of the work. Just as important as anything make sure to wash the rotors before and after installing. I could go on.
here you go...
The Perfect Brake Job