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If this is what you want to do, honestly I'd reccomend something skinnier than those two.
If you're set on those two skis, I'd advise you go with the Night Trains, they're a far superior ski to the JJ.
If you're looking for reviews on them, Blister have done two part reviews on both skis. Take a look at them here:http://blistergearreview.com/gear-reviews/2011-2012-moment-night-train-186cm