You should really also ask about what Oil and Tires people use and why....
Having had several "naked" type bikes with various windscreens over the years you really just have to try them which is expensive and dumb. But your experience will greatly vary from others. See if you can get some used either here or e-Bay. Then if you don't like it you can sell it for basically what you paid (the "used" price). Maybe if you find someone who's the same height and with the same helmet you can get some idea.
FWIW - I just run the stock in the lowest position most of the time because I hate dirty air on my helmet. I got a Used OEM Tall screen, with plans to sell if it didn't work. Instead I just cut 2" off the top and it's fine when I need more protection. I get clean air to my helmet but it keeps more off my chest.
If I want to be in a bubble I'll get a cruiser or an ST1300.