Here's a quick list of my findings so far:
V-Stream: Good wind protection when fully raised. At the lowest setting, flows very little air for me. (I am 5'10.5" and have Murph's 1 3/4" risers.) Seems like this would work pretty well in the winter. Also like the look of it on the bike. Won't be too good (for me at least) in summer heat.
Cee-Bailey Medium: I like this quite a bit. When fully extended, is just about 2" taller than stock, and slightly wider. Still get some buffeting when fully raised, but not bad over all. I'm not too keen on tinted shields, but the very light tint on this looks good with the Candy Arabian Red of my 2012. Buffeting is reduced from stock screen across the board, and flows plenty of air when lowered.
AeroFlow Large: I have a real love-hate relationship with this one. It works incredibly well, in any position. However, it is by far the ugliest motorcycle windscreen I've ever seen. Totally ruins the looks of the bike, IMHO. But it works, and very well at that. Might have to buy a used one for the winter time.
That's all for now. Will test the other 3 throughout the week.