I think that you could probably get by with the shorter screen. The medium screen, as it sits on my bike, is several inches below my line of sight. I doubt if it would be in your way. One thing I have found out over the years, is that it is pretty easy to cut windscreens down a bit if they are too high. That way you can customize to your taste. I didn't get the extenders for the mirrors and have had no problem with them contacting the screen at full lock. The Barkbusters are another matter as they had significant contact until I installed my ROX risers, which I used to pull my bars back a bit. Now they barely touch the screen, in fact the contact is so minor, I'm not going to worry about it.