get the 170's, i am like 5' 8-9" and i rock this years ar5 in 170, just cork your spins if you think they are too big for you, but i dought they will be. and um, remember that the ski up to your nose thing doesnt work on twins, you have to remember the back tips and the nose wont be on the snow, just pick whatever, i think you should grow into them tho.
-kulpy-