Forgive me if this has been covered and I missed it, but the SG X-Kurve is lighter than my Kifaru EMRII by over 2lbs. That is significant weight when doing remote hunts. I own over 1/2 a dozen Kifaru packs and frames, they are all well built,, I might even dare say over built. Mil spec one might say. SG has a proven track record to be tough enough, without being over built. The new belt as mentioned locks in like no other I have tried, no slip at all. I'm 150lbs 30 inch waist, this kind of puts me between a small and medium with kifaru belts. The small does not wrap around me enough and the medium will bottom out as I drop weight on a long hunt. The comfort of the frame is awesome, but try as i might I have always got a bit of belt slip with a load. The SG belt with the side straps lock around the iliac crest and the non slip belt keeps it there. I really love the EMRII bag, but I believe I will be Okay with my Sky7400 bag too. The X-Kurve can also be adjusted for another user quick and easy, kifaru is easy too, but the advantage goes to SG.
Steve