I love the Mammut Nirvana Pro - it's not on their website yet (they only have summer gear up) but you can find info if you google it.
It has pockets for everything, all independently accessible. Helmet carrying straps, ski & board carrying straps, hydration pouch, pole straps (well ice picks really but they work!), soft-lined goggle pocket, waist belt pocket, etc. You can get it in 35L or 20L (I think) - I find it too small for an overnighter but perfect for slack-country.
It's the best pack I've ever had!