I am a real fan of the Six Moon Designs packs. I have had an older Comet for almost three years and have never even considered another pack. With the stays (but without a stiff pad), I carried over 35 pounds for a few days last summer. My shoulders, back and hips were just fine, although my knees and feet were screaming.

When this pack arrived on my doorstep in June of 2006, I loaded up all my gear plus the equivalent (in both weight and bulk) of a week's food. I then hoisted the pack and did a really boring "hike" around my house for two hours. The pack felt as though it had been custom made just for me!

Your Mileage, of course, May Vary, but the Six Moon Designs packs (Comet, Starlite, Traveler) are definitely worth your consideration.