I have a Quantum QFLash system lying in my studio. Compared to Godox stuff I use (AD200 as well AD600), I wouldn't even touch Quantum. Sorry. For someone using outdoors in the sun, modeling light is totally not needed. Forget GN numbers. A single AD200 in a medium softbox will give you like f8 easy at 6 feet. Need more power, stick two AD200s in a dual head. Need more, get yourself AD600. Being able to control power from $50 Tx is so nice. And HSS is icing on the cake. Want TLL it is there. Now you can even start with TTL, lock that exposure and shoot manual. I think I paid $275 for mine. You have a cheap profoto here.