Replying to New Skis

Hi,
I plan to do a ski instructor course in Canada next year. At the moment I have an Atomic All Mountain Ski, that's 83mm wide (don't know the exact series atm) and I could use an old pair from my dad, but this is more of a Touring Ski and I didn't like it the few times I used it. Now I am considering buying a new pair of skis for off-piste because I wanna get more in the freeride side of skiing. I'm thinking of a Bent Chetler, but I'm not sure which one. The 120 seems great, but it's obviously not that great on the normal slope. From the 110 I read a test and they didn't sound too convinced as it was unstable and felt weird. The 100 sounds great as an all-rounder, but I'm not sure how well it performs on pow days.
What do you think?