get a pair of last years scratch fs (caution tapers) in around a 174, mount it like 2 back from true center. It will be good in everything. I ride the 181 and it is just an awesome all around ski. I have other pairs of skis yet I just love riding scratches cause they are poppy, responsive as hell, and solid performing.
Also, you should be able to find a good deal on these. They were on a certain internet site for super cheap recently, and some of the shops in my town have like palletes of scratch fs from last year they can't sell.