Just a quick response here on a couple of items. I got the light gray but think I will switch to the medium or dark gray. You say that you are a tall guy and I think that the 13 inch may be better than the 11 which Mark said would be for guys shorter than me. I'm 5' 9-10". I have a Rick Mayer seat which places me about 1 inch above stock.
Regarding Mark saying that raising the shield too much reduces it's effectiveness. That's because it allows too much air flow up between the shield and the base. He was not referring to the height of the top of the shield. He was referring to the height of the bottom of the shield. Look on this thread at the picture of the installation on a Road Glide or look at the GL1800 pictures on the Madstad site. The shield is fairly close to the bottom of the base. Using an 11 inch shield, you'd have to slide it higher to get the top up where you want it. The bottom of the shield would be quite a ways up the base. At least that's my interpretation of what he said. Not that I'm any expert. I may have misunderstood but I think that's what Mark was saying.
I haven't tried the shield with a passenger yet and would appreciate you sharing your experience on that.