wait, you are trying to find more stiff pads, yet need a finer polish than OP...???
try a megs finishing pad with OP, or a lake country blue or green with OP
maybe try a pure polish like megs 82, or something that has NO cut to it, then polish out your BMW with two coats of that combo to see if that helps your micromarring issue...IMO, you should go with a polish that is pad dependent, but since you dont like OP, try the megs...I hear scottwax really likes it for clarity