I' am looking for the ideal size snowboard. My height: 184cm (6 ") Weight: 83kg (183 pounds), boot size 11.5 (Burton Ion). I read a lot of opinions, but my can not decide which size would be better for me. How much more be shorter than the normal size? 154 from the thought, but perhaps I'm wrong! I currently have 159W burton Joystick and Travis Rice 161.5.