The OEM windscreen is really not much more than a hood for the instruments. I replaced it soon after I bought the bike in November. For winter riding (mid-30s to mid-50s temps), I currently have a V-Stream Touring windscreen. RevZilla sells it. I like it a lot. At first it looked too big for the bike, but not now. It very functional. It's wider and a lot taller than OEM. In the middle setting, it does a good job of moving the airflow upward and outward for better protection against the cold (along with heated gear, of course). It's only available in clear.
In the spring, I'll get V-Stream's Sport Touring windscreen. It's smaller than the Touring model, but a better shape than the OEM windscreen. It also comes in a dark tinted version.