Ok, I'm not a woman

But, I have a GG Mariposa, an Exos 58 and a couple of Aarn packs (Peak Aspiration and Natural Balance). Haven't tried the ULA Circuit or the ZPacks Arc Haul, but I do hold ZPacks in high regard.
If you're looking to go light, I can 100% recommend the Mariposa. In terms of comfort, I have found the Mariposa very comfortable up to 15kg above that, I'd go Aarn or Exos depending on what gear I'm carrying. Volume is exactly the range you're looking for and the weight saving against traditional packs is excellent without sacrificing carry comfort. I've carried the Mariposa across Scotland twice (320km ea) the Sweden Fjallraven Classic (120km) and various other shorter walks in Australia including some in Tasmania.
Having a heavy duty pack for off track expeditions is a good option but for regular non devastating walks the Mariposa is my pack of choice. Light, sturdy and well organised with it's built in pockets etc and low weight.