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I own the Armada Ar7 and love it. When I tried the JJ it was good in fresh untouched powder but sucks in chop and speed.
Night train is a better choice if it's between NT and JJ. NT from what I hear kills it. Another ski that would be sick if you can find it cheap is 2013 Kastle West XX110. Heres a review by blister gear review. http://blistergearreview.com/gear-reviews/2012-2013-kastle-west-xx110
You could wait til you head west and get to the mountain. Theres gonna be gear on sale from last years and people who want new stuff. It might not be brand new but it will work well. This will save you lots of money.