I have the 10" windsplitter on my Ultra and it does a good job and looks really good. I went right from the stock 10" to the WSplitter so perhaps I dont know what i am missing with some of the other options out there but I am comfy behind the windsplitter so there is nothing for me to fix right now.

 

I have the 10 on my classic as well, at 6'2", I sit sort of high in the saddle, so works n looks good. I'd like to try a smaller one but not sure