I ran Galfers on the SuperHawk, no complaints. They suggested different types front & rear, one was the green and I think the other was black. He suggested a less aggressive pad for the rear which I think was the black. The Galfer pads look more like automotive type material and they say the rotors last longer with them. No clue on price.
HH pads seem to be everyone's go-to, no idea if they're actually better in some way or maybe it's the racer's choice so the street guys use them. Way back I read a long article about pads and the effects of different materials, but don't remember the specifics. Some have more initial bite but less progression as the pressure goes up, some are the opposite. Some do better with high heat like hard track use.
Tho kinda spendy they can last a really long time, depending on how you ride, so it's probably not a place to look at the cost as a priority. Any will work fine for most conditions, but rather than take a user's suggestion without reasoning for their choice I suggest a little research and choose according to your needs/wants.