I am an expert skiier. 5'11'' 185 pounds. I ski mostly new england hardpack. I am somewhat aggresive but not a speed demon. I would say I am more of a carver and cruiser as i get older. I usually ski 170cm. Currently I am skiing 170 head monsters 72 and 78's. I found a great deal on 163cm k2 recons. Would going down to 163 cm be a drastic change? If so how so?