Sorry, I don't have any input on the ones you listed, but thought I'd throw out my 2 cents even if you didn't ask for it ;)
You may want to look into the deuter brand. When trying on packs with 35lbs in them, my ACT lite was the most comfortable. It was also one of the cheapest at $170? It's 65 +10, and has an adjustable torso length, which may be usefull if your buying a pack you can't try on. My wife has the women's version and loves hers. Until we can afford to go ultralight, they are serving us well.
No matter what you get though, be sure of there return policy, because what is comfortable for one person could be torture for another.