Any of these two will work. Lowers will add a lot of air tranquility and stability at high speeds. The rear slant of the screen is important. Most big screens are set too vertical.
I will get a bit of buffeting at times, esp when driving into the wind. I think most of this is due to air coming up under the shield. Lowers would probably stop this. Has anyone had any success with the Laminar Lip?
I have laminate at lip on my roadster shield, it seems to be working real well. I have the shield raised to highest point on mount no buffeting and can ride with no eye protection at 70mph on freeway as no wind in the eyes.