1. HD FXSTDI
2. Yes, 2 of them. Both Shoei's. 1 full face, 1 half. full face is older, don't remember the model but it's design is similar to the R1000s. Cousin rides sportbikes and swears by Arai's. Tried a couple of his and they're very nice. Pricey though.
3. Visibility first, Ventilation 2nd.
4. I'm in the market for a new full face, and I'll probably spend $350-400.
5 & 6 - Nope & N/A respectively.
Just make sure whatever you buy fits you comfortably - if it doesn't, you won't wear it, and that kinda defeats the purpose of a helmet!
