Just got the 1600/500 combo, with the 500 for my head.
Their helmet clamp is the best one I’ve used because it’s not velcro but clips, and it allows placement right on the top of my particular lid. It is heavier than what I’m used to (separate battery lights) but it’s very well balanced so no more annoying.
Beam is fairly spotty but graduated so works very well as a lid light. I wouldn’t use the 1600 on there though but I don’t think there’s a need.
I always go for less light in the lid because personally my brain seems to rely on the shadows created by the bar light to pick out shapes on the ground quickly, and if the lid light is too bright it removed them and I can’t process trail features properly. But this may vary between individuals.