hey i am an intermediate rider. i ride mountain and park. right now im riding a rosignol scope 156. its a nice ride for me but i feel limited in the park. i think i might be riding too big of a board. im 5'9 170 pounds and wear a size 9 boot. been looking at the ride agenda 152 and 147. i feel the 147 might just be way to small for me. any opinions?