Replying to Foil, or Guns???

I'm moving out to Nelson, B.C. this year, and am looking for a good all mountain/park ski. I've been skiing on 1080's for ages (my first pair of twins were the VD 1080s), and I love em. That being said, If I get a new pair of skis this year for out west, I'm not sure if I should grab the foils or the guns.

I'm about 140lbs, and I was skiing on 166cm foils last year. If I stick with the foils, would it be wise to grab a size larger???

Apparently they get a lot of fluffy snow they call "powder" out there, and being from Cambridge ON, this whole "floating rather than skating" concept is totally new to me, so any help is MUCH appreciated!!!