I think it comes down to how long you ride. If your apt to ride at higher speeds frequently for long distances, go for it. If not, save your cash. Keep in mind, they're relatively easy to take on/off and their resale value appears fair.
I don't recommed the Triumph summer screen as the head buffeting is extreme for a 6'1" goober like myself and plenty of bugs routinely smack into my trusty Halycons. It kind of defeats the purpose in my book.