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i dont have a lot of time to respond, but as for the audio helmet, i'd say skip that feature.
i purchased one a couple seasons ago and quickly realized that it's extremely inconvinient unless you're skiing by yourself. you dont have the option of only listening in one ear, and whenever someone wants to talk to you then you're forced to dig through your jacket to pause it and continue your conversation.
plus, it's pretty dangerous to ski with music in that you cant take out quickly or somewhat hear over. it's a rare instance, but hearing someone shout at the right moment can make a big difference.