I have always had one issue with ultralight packs. Most of them seem to always skimp too much on the suspension and then try to give you all kinds of "bells and whistles" that add more weight to the pack. Why don't they make a larger version of this, say around 50-60 liters:

http://www.rei.com/outlet/product/776902

I always thought it would be great to take an ultralight waterproof roll-top stuff sack and attach a nice sturdy harness to it. The most I might need besides the one large compartment would be two water bottle pockets on the side and maybe a small outside pocket for essentials.

I really want a pack that can handle 30-40 lbs. but still weigh 3 lbs. or less. I think this could be done if they keep the main bag simple, focusing most of the weight of the bag in the suspension.

What do you think?