Depending on your use, myself and my cousin both use a Mystery Ranch Beartooth 80. We are also the guys that will haul 120+ on a pack out if we get something down instead of making one extra trip back in. It has more than enough room to fit everything for a 10 day back country hunt, and pack out your critter when your done. Our packs full on the hike in for a 3-5 day hunt, with rifle, spotter, water, food and so on are around 58-62 lbs depending on any extra niceties we take, and have oodles of room left. The pack itself is 6.7 lbs, and has about 5,200 cu-in of well organized room. We both used Alpz outdoor packs before of different varieties, this beartooth is the same weight as my previous 3,100 cu-in pack, and I carried around a needle and thread for repairs of torn stitching and such with that pack. I have had no issues with this pack as of yet.
If you won't pack more than 80ish lbs, or won't ever stay in the back country for more than 3-4 days, maybe look at the Metcalf or Sawtooth, and cut some weight, a lb or a little more, and excess room. However, If I was going on a sheep 10 day sheep hunt, this is the pack I would take.