I am looking to buy my girlfriend the rossi voodoo pro bc110. She is a strong skier that ski's the entire mountain out west comfortably (double black hike-to terrain included) but doesn't quite "charge" (speed-wise) like a true expert might. I think its time she gets a more advanced ski for deep powder days and crud that will boost her confidence more. She is 26 y.o. 5'5" 140lbs and currently skiing on 158 dynastar legends that have a 75mm waste. I can get them discounted at a 159 length. Does that seem right? Thanks in advance for your help.