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.
16 Gnu Swallow Tail Carver . 16 NS West . 15 NS Snowtrooper BIA
16 Burton Genesis X . 15 Now Drive
16 Flow Talon . 14 Flow Hylite