I am similar to you, 5'11"-6', 30" inseam (long torso). Just installed a 13" MadStad. I have only done some short test/set up rides, but I am impressed so far. Quiet and no buffeting. I started with a 11" WS but felt I did not have enough adjustment available to get the air off the top of my helmet. 13" did the trick. I will be installing a Mustang seat also when it arrives??