Nice! The '04-'06 don't have as many windscreen options due to the wonky shape, but there are a few available. I favor being cold over buffeting so I just deal with it, I like the clean air that hits me about shoulder-height.
Regular gas. Page 3-9 of the '06 manual clearly states 'use regular unleaded gasoline with a pump octane number [(R+M)/2] of 86 or higher'.