I’d throw Akek in the top tier if for large packs if you’re able to review. It seems to be a very well thought out carbon frame system. Comes with accessories you’d normally have to add and has a quality build from what I read. The 5400 was priced just over $500 but looked very comparable to some name brands that are double that. Would have gotten it myself but ultimately settled on a MysteryRanch Marshall for my pack. This was only because I saved 42% using ExpertVoices to get a discount. Otherwise, Akek looks like a serious competitor with lifetime warranty. Even has a QD release for side mounted rifles or bows.