I’ve hunted with many types of packs (eberlestock, badlands , mystery ranch, Cabela’s, etc) and the Vorn. That being said if you want your gun secured and quick access non can come close to the Vorn. Gun is really secured well and comes out almost instantly. Drawback is that most of the others allow for better packing out of an animal. Obviously depends on what your packing out but I’ve had a good load in the Vorn and it’s Ok. Frame packs are obviously better for more load but gun access is limited.
Used the Vorn on a couple of cold weather steep mountain lion hunts and was very satisfied. It is a bit heavy but balanced out pretty well.
FWIW I have been packing my DT Covert around in an Eberlestock this year so light and fast is all relative just depends on how far and high you have to go.
Lots of good used packs out there for sale.
When you get it narrowed down let me know. I probably have something that may interest you.