Yes, it would help to list your criteria. Those I had when I was looking for a lightweight internal frame pack: under 3 lbs., capable of carrying 30-35 lbs. in a pinch, the right size for my gear (about 3,000 cu. in./50L), load lifters (my shoulders are very sensitive to pressure) and, of course, that it fit me. Amazingly, I found exactly I was looking for in the very first pack I ordered, the Six Moon Designs Comet. I notice that no Six Moons pack made your list, which only proves that we are all different!

Having heard so much about the old Mountainsmith Ghost, it was interesting to see what it looked like.