I would probably lean towards the AR7's. I'm a little biased as I am a big Armada fan, but they really are nice skis. They are a little softer and a little more forgiving than the Wall, and for someone of your size who is still getting into park, I think that would be a better bet. That being said, they are still plenty supportive and you won't out grow them right away. The Walls are also a sick ski, but they are a little heavier and a little stiffer. Personally, I really like both skis, but it sounds like the AR7 will be a little bit better fit for you.
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