So far in my testing this is what I have found:
V stream - It worked OK for me, but just OK, Still way better than the stock 2011 Shield.
Aeroflow large - Silent, large, and very functional, it probably worked the best of all of the shields so far. For me the shape was the deal breaker, it just didn't match the lines of the bike. But if you like a quiet shield this one works.
Cal-Sci medium - worked almost as well as the Aeroflow and was very quiet if I ducked down some. It matched the lines of the bike well, and was 100x quieter than my stock windshield so I ordered a large one yesterday, it should be here Friday too.