CGX car nut:

The orange #4 Elva is stunning and looks perfect if one has access to private roads.  For much of the country, unfortunately, the Elva with windscreen seems the more practical choice as road conditions, and large pickup trucks, mean rock projectiles are a common threat. 

Thank you again for the informative write up.

My pleasure.  Definitely agree on the projectile risk and I dont think the helmets provide the same level of protection that a windshield does.  Also the wind against your face/helmet gets old after a bit.