So lets not get too carried away with trying to eliminate all of these effects of physics. It probably is a waste of time - and money! I eliminate much of the harmful effects of wind noise by wearing earplugs. You do all wear earplugs, don't you?
Consider yourself lucky. The buffeting is real, but for whatever reason, it sounds like you haven't experienced it. My experience is this:
I don't like naked bikes. No matter how "clean" the air might be, I can't take the wind noise, even with earplugs. I don't think the best helmet will remedy this for me.
I don't like the looks of a screen that's big enough to completely hide me from the wind. You might be suprised how quiet and pleasant it actually is in this kind of setup if you've never tried it.
The two above scenarios are easy. Either remove the screen, or buy the biggest honking screen you can find. I don't think Givi is big enough for complete protection, or any of the CalSci's in Large or smaller. Same goes for anything similar. I don't know about the Cee Bailey's, Manta, Windstrom, but if it's not BIG, you are not going to be completely sitting in the "pocket."
Disclaimer: If you are 5'5" and shorter, maybe the typical aftermarket screen does put you in the pocket. Great, you're done!
Most people on here are trying to find that middle ground. My experience says this middle ground is the most difficult thing to acheive. If you are not totally in the pocket, wind coming off the screen and bike is going to hit you in the body and helmet, and the trick is to find some combination of screen, screen tilt, screen height, mirrors, mirror position, helmet, riding position; that will keep the air from becoming turbulent BEFORE it hits you. You are still going to feel and hear air, and you might not be able to ride with your helmet visor completely open. You do have to have realistic expectations.
I'm very close with a CalSci Large, Madstad, Scorpion EXO-700 w/chin skirt, and Aprilia mirrors. I have a OEM Gel seat and a pad on top of that, so I'm sitting higher in the seat than most people 5'11". (I won't go into more specifics about Madstad positioning as it really doesn't matter for anyone but me.)
I'm going to try and find my little corner of perfection with a used Givi and MRA Spoiler attached. I don't have all the pieces yet. If this doesn't work, my current setup is really pretty good, and I can move onto buying other stuff for my bike!