As many have said; there are a LOT of great packs out there, and the only way to figure out which is "best" for you, is to try as many as you can, with as many different loads as you can.
My experiences are as follows, and that's it; only MY experience. Under 75lbs., I'll use anything, but like my Stone Glacier best. 80-100lbs, either the SG, or the old Kifaru with the EMR II. My old knees won't take it anymore, but when they did...anything 100lbs+ was the Barneys. Always thought it was strange how the Barney's wasn't the most comfortable for me, but was hands down the best when packing more than you should.