Hubby is after a taller screen for his 2003 1150 GSA, it's got the oem screen at present. Any thoughts on which is best. He's 6ft and finds the stock screen causes buffeting around his head.
I'm 6' 2", had MRA Vario screen on bike for past 8 years and 100,000 miles; works well and done many long trips with it on; but note you do need extra fitting kit for the GSA.
http://www.bikehps.com/acatalog/BMW_R1150GS_1990-2004_MRA_Adjustable_Motorcycle_Touring_Screens.html
I use a Secdem Bullster screen for the adventure. Very well made. Got mine originally from Motobins but not sure if they still do them, wider than a standard adventure screen as it dosen`t come in around the mounting points, and a bit taller.
You can still buy them direct from France though. https://www.secdem.fr/en/catalogue-produit.php?reference=BB045HP
I'm 9'6". I made a stable door out of clear perspex. In the summer, to let cooling air through, I just open the top one.