The Lost River is bigger, but I use my FTE as my standard pack, with five meat bags, two knifes, a full survival kit, medical kit, rope, poncho, spare plastic bags for heart/liver/kidneys, two quart platypus bag of water, two contractor trash bags for sheltering out a bad storm, warm hat, neck gaiter, compass, GPS, fleece jacket, food, and other stuff--and that's with the side panniers detached. I only use them if I'm going out in heavy rain or bivying. I like having a very low profile pack that doesn't hang up as I twist and duck through thick brush, and I regularly cinch a fleece and/or shell on top. The Lost River would allow easy bivying, warmer clothes, full rain suit, etc. with some cost to your profile and to convenience. They are excellent, excellent packs, and the seamstress whom Angelo employs here in MT will likely undertake any mod you want. She is terrific and highly skilled.