Back in 2005-2006, when I went through the lightening up process using your 27 lb, 7 day gear list as a model, I found that Mountainsmith had discontinued their light weight packs and gone much heavier. Having found what I needed elsewhere, I never checked back. I just looked at their website, and they are still featuring heavy hauler packs that carry (supposedly) 60-65 lbs. and weigh 5 to 5 1/2 lbs. They certainly can no longer be considered lightweight!