good call on the experimenting before dropping $300. I do use earplugs. I removed the visor today, road 300 miles today, and had a loud whistle the whole time. I'm convinced it's the helmet - I'm gonna try and test a few old helmets out in order to find the right one.
I used the same XD3 on my previous 1200gsa and had no problems given the car-sized windshield I was relaxing behind. The 800 is a different story.
Sounds like the Hornet may be better/quieter for 60+ speeds???