I wear an Arai TourX3, it's absolutely excellent, I've got a pinlock visor so misting isn't a problem. I've tried it with goggles and I didn't like it. The only advantage I can see in using goggles is better ventilation when you're wrestling the bike around off-road. A well designed, visored, peaked helmet should be stable at speed, I was out on a friends R1 a few weeks back and hit some pretty nasty speeds (on private land of course) and didn't have a problem. Last week I did 630 miles on my Versys in one day with the screen lowered and I was fine, my backside was hurting long before my neck. You shouldn't have a problem with the wind at MX/Green lane speeds.