The BL's Sacrifice looks to be made similar to an Osprey pack. There was a great review and picture spread showing the pack layout and material. Great for a 3000cuin daypack, but not enough suspension for a lot of weight IMO.
Speaking of Osprey, don't discount older expedition packs like Dana Designs or Mountainsmith, not to mention the new expedition packs out there. A simple camo ruck cover can hide a lot.
Kifaru and Mystery Ranch are TOPS - great suspension, great build quality, and made in America. I've already got one, just working on the other...