Maaaaaannnnn, if you ride when it's anywhere below 50F, I tip my hat to ya. It's been a LONG time since I've had to battle cold weather on a bike but I been there... in the hardcore cold. The only thing that kept my bike parked was snow and ice on the road.
I *believe* people who have tried many of the aftermarket shields say the Madstad provides the smoothest and quietest rider air. I have an 11" Madstad and a 16" Clearview. These measurements are a bit misleading; when installed and measured in identical ways both of these are virtually the same height... but the Madstad allows adjustment of the vertical angle and thus can be configured to provide more protection.
I'm 5'10" with 32" inseam and can easily see the ground 30 to 40 feet in front of the bike when I'm on it.
Maybe someone else can chime in on the Klockwerks for comparison.