I see you are of a larger frame. I usta be a little bit bigger until I changed my life to be successful in the back country and have slimmed down a little. Even so the exo k4 is a fantastic choice. You can turn the shoulder straps outward. It locks great on the hips with no slip, customer service is second to none. I did not have good luck with the sg, it would pinch my traps. Out of the packs you have suggested the kifaru will be the most versatile.