I used two windshields, the little Flyscreen:

and the Street Shield:

(pictures from National Cycle.)

The Flyscreen blocks just enough wind to have the wind trying to shove you off the bike at 75+ mph, but with full wind in the face.

The Street Shield made the ride back I-10 from the Mojave in a 40+ mph headwind, made a 500+ mile days acceptable, cut the wind in the face but with wind in the hair.

I've got the Suzuki windshield on mine and I like it.  I do get a little buffeting at highway speeds and may try adding some lowers.  I think Schleppy's offer would be a great way to try one out!  If you decide you need a larger shield then you'd only be out shipping--good deal.

Another vote for the stock Suzuki S-40 screen. Sized just right to keep the wind blast off the chest, but short enough to see easily over the top of it. I also like that it is well made and very stable, even at highway speeds.

I have the Plexifairing. I commute in the rain, so it helps keep less wet. More importantly, at 50mph it keeps the raindrops from becoming hornet stingers.

The downside is that I have to wax it in the evening when I get home (with spray on wax). The wax helps keep the rain from gathering on the shield. I am looking at possibly adding a manual wiper to it.

At night, in the rain it can be problem. Riding in the dark, I once stopped at a stop sign where all the steam came up from my fins and fogged out my windshield. Because it was so dark, I didn't realized that I had been blinded until I took off and couldn't see the road, and I felt the pavement change as I ended up on the shoulder. Yikes.

The shield has developed some cracks and I'm looking for some replacement. It would be nice if it had a top that easily flipped down when I need visibility over comfort  

Last one was a Memphis Shades Demon. Works fine, looks odd the way my bike is built. http://www.memphisshades.com/universal-mount/demon

Have an older Maeir universal on the CL100 that I test fit on the Savage. Would work fine, but again, looks goofy.

I'll be ordering a small tombstone/police handlebar mounted one. Can't run a fork mounted unit in conjunction with the 7" sidemount headlight. And need a retro windshield to match the rest of the build, IF, and I mean if, I decide to junk it up with a windshield at all.