I generally run Bendix pads on my stuff. Do NOT use their "Global" pads - They're the budget line and are imported crap. I have never had a complaint from anyone when I used Bendix pads on their vehicle. I should point out that not all types are available for all vehicles. For instance, my D60 front axle has only TitaniuMetallic II's and Fleet MetLock available, while H3's have everything except Fleet MetLock available. According to their site, the Global pads are listed as "Good", TitaniuMetallic II's and CQ are listed as "Better", and CT3 and Fleet MetLock are listed as "Best". I've only used TitaniuMetallic II's and CQ's. Never used the CT3's, but they're supposed to be the best. I installed the Fleet MetLock on my D60, so I will see how they work out once my rig is rolling again.
Raybestos has a good reputation for their top of the line pads as well, but I have an easier time getting Bendix around here, so that's what I use. If Raybestos were easily available and the Bendix weren't, I'd have no problems using them. Both are OE suppliers, although I don't know if either supplies the pads for GM. Obviously, pads from GM should work fine, but you pay a premium. Parts stores branded brakes are hit or miss... usually miss. They could be made in North America, or overseas, and they could work fine, they could squeak, they could generate lots of dust, they could eat rotors, or they could disintegrate. I have had them do all of the above at one time or another, which is why I stick with what I know works.