Spent many,many years in Cobras with our heads significantly higher than the windscreen and it wasn't a problem at all. The Cobras did not have sunvisors, but the windscreen certainly stands more upright, although the driver/passenger heads are closer to the screen than in the Le Mans as well.
In the Le Mans I'm certainly not worried about the heads sticking up above the windscreen. Even with the rake it has, air will flow well clear of the driver and so will any bugs/small debris, especially with how far the driver/passenger head is from the windscreen.
At least the rear humps/side glass will significantly reduce the turbulence that comes at you from the rear/side in a lot of open top cars.
I'm loving the Le Mans, but then I could be considered to be bias.
