I'm 6'2" and i get on okay with the standard screen. However i noticed a huge improvement when i changed helmets! My new Shoei XR900 or whatever is called is so much more stable than the one i had before. Rushjob lent me a high screen to try but to be honest i got half way through fitting it and took it off again - i just couldnt handle how it looked. Never actually rode the bike with it fitted.
The comfort kit has bar raisers as well i think. Its only a half hour job to change the top fairing though. They crop up on Ebay now and again.