Replying to Punx vs. AR6 vs. JO PRO

Alright so Im 5'8" aroung 125lbs (yeah im fuckin light) and ive been looking at this years punx and Ar6s as well as last years JO PROs for next year. Im planning on skiing pretty much everything but powder...i live in quebec we dont exactly get much and plenty of park i just wanted to hear what people feel about these skis. Ive picked these ones because ive heard good things about them and they seem to fit my price range I also would like to know if you could reccommend a size cuz i dno whether i should go with a higher 160 or a lower 170.
Thanks, Steve