ARG: only for pow. Reverse sidecut is very exclusive.
JJ: tail dancing like a whip.
Hellbent: perfect in pow and hardpack. Just a little bit soft tail for landing big jump on harpack but nice in pow (just check Sean Pettit in The Massive and Claim on 1,69m K2 Hellbent. He landed safe without problem. Longer skis will be a lot easier too.
JJ's are the ski. Don't know what the above guys are talking about. The JJ is a solid all around pow skis that still give'er on hardpack. 115 too narrow? What, maybe for blower pow, but for crud? Have fun on a 130+ bud.