If cold weather is your requirement, I would definitely stay away from Leaf. I have had a few friends use them in cold landscape situations, and both stopped working around 32F or slightly above. Apparently the feedback from Leaf was that they don't guarantee the unit working beneath something like 40F.
I have used a Phase One back in very very cold conditions, like 20F, and it worked like a charm. Heck, even the battery worked for a few hours.