So, I live in the west and travel for work. I had a chance to visit all 3 headquarters in person. All 3 allowed me to pack 100 pounds of sand and hike a bit to get the feel loaded.
Kifaru, Exo, and Stone Glacier are all fantastic companies. It really was Nike and Addis, or Ford, Dodge, GMC. I believe packs come down to fit and personal need/preference.
All Three companies did a fantastic job of fitting me with the pack that they thought suited my body type and needs.
That being said; I went with the Stone Glacier Evo 6900 with the old Krux frame. The X-curve, just didn’t fit my back properly. I loved the Exo bag, however the softer pad slipped down my back under the heavy load. I really loved the versatility of the Kifaru system, but not having a dedicated meat shelf made the load sit low on my back.
After running the SG for a year. I can say that there are things I love and things I don’t love about my pack. I still love the way it handles the heavy load for me. Even though it’s a bigger bag, it will bivy in, no problem for a day pack.
I do not like the lid design when it’s not full. It always wants to slip down and flop around. It’s not a deal breaker, I just wish it was more stationary.
I don’t see me shopping for a new pack anytime soon. I am very pleased with my choice. I did Three heavy pack outs with the SG last fall, and it did a fantastic job. I also train most of the year with almost 90 pounds of sand in it. In other words, I have done hundreds of miles in my pack under heavy load. It’s holding up phenomenally!
However, If you told me you went with any of the above three companies, I wouldn’t argue with you. There isn’t a wrong answer here. It’s just what works best for you and your body.