I put a 10.5 tinted on our K9. Our bike is black w/live flames, and it isn't too obtrusive. (IMHO) 
As a side note, I tried a 12" first and had to swap it for a 10.5. With the 12", you had to look through and the distortion was too much. I know the shape of our bikes are different, but make sure you can see over what ever you get.
Even the 10.5" had an effect on my passenger. My wench says it made a lot of difference for her.
To each their own on windshields. I've ridden for 45 years and rarely had any wind protection on any of my bikes, but this makes a 400 mile day easier for both of us.
