I know this NOT going to be the answer you want but... I'd leave the pads alone and let them make noise. For one, you'll know the calipers are not sticking. The pads are off the discs because you can hear the noise when brakes are applied. There is less "forced friction" to the pads to wear down (without brake apply)....thus, the discs stay cooler, and the pads last longer. The pads will have a tendency to float and find "home" easier as you apply the brakes. In other words, let 'em rattle.
This is one opinion. Wait for other threads to help you with your question.