I am really interested in getting the Surface Watch Life ski especially since I can get it at a good price. The shortest size is a 172. I am a 5'6" 145 lb female. I am an expert skier and ski all mountain but have never owned a pair of twin tips, although I have skied on them a lot. Do you think that these 172s are going to be too long? I have always been very confident on any size or type of ski but I am a commitmentphobe to actually buying new twin tips if they're not perfect. Any advice would be greatly appreciated.