The 159 is the right length for your height/weight/boot size. Sounds like it's your skill that's lacking, so in that case maybe the 157 would've been better for you.
15 LibTech TRS HP . 15 NS Snowtrooper . 15 NS Ripsaw . 13 Salomon Pow Snake
15 Now Drive . 14 Now Drive
14 Flow Hylite