I just installed the Clearview XL, with center vent (took 4 weeks to arrive).
Much quieter, very little buffeting...but enough to bug me. A bit of a draft on the back of the neck, but I always wear my neck warmer in cool weather.
The only wind I feel is under my tricep area.
I do look through the windshield on this one. I am also using a Corbin seat which is about an inch lower than stock.
The odd thing is, the best protection I have ever had on any bike...has been one of those cheap handlebar fairings, a Plexifairing from National Cycle. The reason this has superior protection and quiet is that the top of the shield is very close to your helmet. Not so with a frame mounted fairing.
The only one that I have seen worth a hoot was from the last generation GoldWing, with a larger screen.
You would think that manufacturers would be able to figure this out, if I can.