I guess I got it made. I've got a ratty old KBC MX helmet that is exceptionally quiet. Also, I don't experience head snap at high speeds when I look to the side or stand up in the pegs. And lastly, on a recent super slab trip in the cold and wet, the windscreen was absolutely essential to keep things tolerable in the cockpit.
I'm not trying to be Carl the Contrary but I just wanted to add an alternate report to the effectiveness of the windscreen (which, BTW, is MUCH better quality than the BMW windscreen I had).
Flying the Austrian Adventure Airlines at 3ft AGL
And a little Swedish rocket from Varese, Italy has me a mile high