Replying to Halp!

I'm a very short person standing at a massive 5'2" and 110 pounds.  But that's not what I need help with.  Finding pow skis is what I need help with.  So far I've narrowed it down to the K2 Seths (169) and the Line Elizabeths (172).  I normally ride a 160 but I figure that since they're for powder that they'll be easier to push around at the longer length.  Will these be "too much" of a ski for me? Am I doomed to ride "skinny" skis forever?  Any other brands/skis I should be looking at?