3 things: Ok, 4:
1) I want a pack with a detachable frame like Kifaru Packs from the bag. This allows me to buy one frame and attack either a weekend climb rucksack or an expedition rucksack. Combine this feature with McHale's Byonet stay system and we are really getting somewhere.
2) I want a climbing harness built into said frame on said pack. Saves weight. No one does this. Its really stupid In My Opinion that this isn't the case especially as one gets a Gigantic WAD of buckles, zippers, suspenders and what not at your waist.
3) I want McHales suspension system. Period. Dual buckle Hipbelt and shoulder suspension strap system where it uses TENSION instead of compression on your shoulders! It can't be beat by ANY other pack. If you haven't had one on your back you don't know what you are talking about.
4) Fabricc: Dyneema would be nice except it doesn't stay waterproof. The waterproof coating falls off the dyneema. Lightweight nylon rips too easily unless you go to an insane weight fabric. Most folks go on a trail or in wide open country where there are no sticks to puncture your pack. For most folks Silnylon is just fine with a heavier weight fabric on the bottom. BUT, if you do ANY off trail work through brush, open forest, climbing, mountaineering(ice), abrasion, or even dessert where there are TONS of thorns, then any form of nylon below 210 IMO is GARBAGE as it will rip and tear in a heart beat. I own many packs. I see many like the ULA catalyst. I fell in love with it on there site as well. Said pack now has a ton of miles on it and a TON of holes in it. Ok, the DYneema kept the pack from blowing apart in said rips, but the lightweight nylon fabric rips very easily. Thus, its NOT waterproof. I still have a 40 year old REI frame pack that is still waterproof without rips using 210 fabric. Well I redid the waterproofing because after 35 years the urethane died.
NOTE: Kifuru gets away with lightweight fabric in that they make their BAGS detach from the frame! So, you can buy a super light weight bag, or replace said "normal" bag that is made out of gossamer air and rips like it as well, or you can put a heavy duty bag on. I also go paragliding, and believe me, said paragliding fabrics rip very easily. Not quite as easily as the lightest of silnylons used on UL tarps, but very easily. The thread count is 70 on paragliders normally I think. It could be 110 on older paragliders. I forget for sure honestly.
That all being said, none of these packs have these features.
McHale packs use 7000 series aluminum sheet stock with 80kpsi yield strength. SOLID aluminum. Yea yea everyone does the same thing. AT least Dan uses the best aluminum out thereunlike everyone else, the dumb schmucks. It is NOT optimal! Rather it makes it easy to build. I am guessing here, that the new Kifuru pack uses a tubular Carbon fiber design for its stays with a wood core.
Thank GOD. Finally!
It will be lighter, more rigid, and stronger to boot allowing one to carry far heavier loads. Period End of story. Why? A little thing called Structural Engineering Mechanics. A circle is ALWAYS stronger/stiffer for multi directional stress. That being said, it is also far harder to buy said round object and to attach said round object with things like BOLTS to things like oh, hipbelts. That and fitting to your back! Said tubes would have to be preformed to a "standard" back, is no such thing, or attached to a "frame to hold said tubes behind it where the frame is the part molded and somehow attached rigidly to the tubes to attain its stiffness to hold its form.
This is especially true of Carbon Fiber as it either holds the stress perfectly OK, or shatters whereas Aluminum yields and deforms. Now I read somewhere that McHale toyed with CF a while back but didn't like the durability. I would point out that he probably never implemented it correctly as I have had many years of experience designing/building with CF. It can be tricky.
There is a reason all high end arrows are made with CF and not aluminum. Its stiffer. This is what you want as the main stays in your pack. Guaranteed. They do need to be designed correctly though.
Sorry, for long post. The ultimate pack is still out there.
PS. Kifuru packs act as chairs without the bag... Quite handy.
Please pretty please, Kifuru use McHales suspension system. His patent ran out I am pretty sure. I have neck headache problems and only McHales suspension system helps in that regard. Oh, yea hip belt pockets are SWEEEEET! Every pack should have them. Yes, I own 2 McHale backpacks. Black Diamond Shadow 55, ULA catlyst, Gregory Denali Pro, Dana Designs Astraplane, Kelty Tioga, Mountainsmith,and several others.