Well, I concur with Panzer (although I prefer the lighter Platypus') and disagree with PapaD. From your list the only problem I've had with hydration bladders is the freezing one. And, that is easily avoidable by blowing the water out of the tube. I've never needed boiling water to stay warm, so I don't know about that one.
Nalgenes are heavy and bulky.
See you on the trail,
mt squid
some observations