I have the 11" Madstad screen which is great for dry weather riding but it does not keep rain off of my face. I've though of upping to the 13" version but I can just see over the 11" when adjusted fully up. I'm 5'9", 30" inseam, and use the stock seat.
I carry a full faced helmet when there are showers in the forecast because those rain drops feel like bb's at highway speeds.