Do we get a present if we get this quiz right? Oh, wrong forum. Nevermind.
I've heard the small fairings work pretty well- I haven't tried them, but if the angle is correct, they should cause a good pocket of still air for you. I doubt, at 6', whether it would protect your head though. I use an R90S fairing with some success, but still get some buffeting around my head at 80+mph. At slower speeds, it works well.
In addition to the overpriced MG fairings, take a look at some other options like Givi or Airstreaming (some vintage stuff looks good).
Just do a general search for 'flyscreen' and it should put you in the correct size range.
http://www.airtech-streamlining.com/vintage/prodvintage.html
or
http://www.omarsdtr.com/fairings.html
for example