Replying to Bent Chetler Help

I'm 17 y/o 5'11 140 pounds and don't know if I should get the 185 or 178 chetlers. I will be skiing at resorts all around the mountain, when there is powder I'll be skiing it. Other than that I will be skiing around in the trees trying to find fun runs with my friends. I want a playful ski and I don't know if the 185 will be too much ski. I also am worried the 178 will feel too short because I have heard the Chets ski short. Any advice on which size to get? Thanks gnarrats