I bought my 20xdc new in 2003 and ordered it with 5" tall windshields at that time cause they look cool. Getting older, and that much wind noise at 90 is not near as much fun as it used to be. Is there a big difference in protection with the 8" vs the 5"? It seems like there would be cause when running if I lower my head just a little it seems to make a huge difference. I may not have the sizes correct, but was thinking Bullet offers a 5" and 8".....