That is a very good article from Web Bike World. They certainly don't like the Stebel!
After reading that, looking at the ratings and listening to the sound comparison I'm kind of leaning towards the Hella or Fiamm.
@2000TJ - Thank you very much for the kind offer to help install the Stebel. I really appreciate it. However, no disrespect to your recomendation, I think I'll look at the other two horns. The Fiamm Freeway Blaster sounds good and I was never really liking the looks of the Stebel ( I know it's not about looks but you know you gotta consider aesthetics! LOL!) But, since you and others are so close I'm always open to a nice Sunday ride. Kenosha isn't far and it's nicer riding up in WI than down here.
Four wheels move the body ... two wheels move the soul.