it depends on your preferences and skill but yeah i'd say that's too small, esp if youre getting it for pow/all mtn
also mounting them up makes them ski even shorter
see this thread for discussion on the exact same question almost (except that that OP is much heavier than you, but every other point still is relevant to you)
https://www.newschoolers.com/ns/forums/readthread/thread_id/765614/