A couple years ago I bought mystery ranch mt, kuiu, exo k3 and kifaru.
Im 5'11" 180lb no hips or *** build, my .02,
kuiu- lightest, nice bag layouts but was the least comfortable with heavy load, my wife loves her kuiu, everytime I put meat on it I'm afraid the lightweight build is going to break something
mystery ranch gl mt- did everything OK, cheapest
exo k3- best bag layout, also like how frame is setup but would give pressure points on my hip bones under heavy load
Kifaru- heaviest, most expensive but was by far the most comfortable under heavy load. bombproof construction gives me confidence, not worried about breaking anything