I've got a GS with the BMW low seat fitted and Fastaway pegs on the low setting. I find this OK for up to 200 mile trips but after that it's a PITA.
After a short road test I decided to borrow a standard GSA seat for a tour around France this summer and had no problems with up to 400 mile days.
I'm 5'10" and 77kg and run the suspension preload on solo plus luggage.
On the low seat I have very little noise or turbulence from the screen but with the GSA seat both a significantly greater.
I find the riding position on the low seat odd, even with the lower pegs my knees are still too bent and I sit too much in the bike, not on it. Some people (judging by the enthusiasm for bar risers quite a lot of people) probably like this, but I find the seat to handlebar relationship is better with the standard seat and the lower bars give me better control.
My solution is (was?) to look for lower bars and see if I can keep the low seat and low wind noise. And there's the problem, when I measure up the standard bars they are actually very low rise, only about 60mm. What is unusual about them is the amount of backwards sweep (160mm). Comparing the standard bars to Renthal Fatbar and Twinwall options all of these have more rise (80-120mm) and all have much less backwards sweep (40-60mm).
So I figure any change will give me a higher bar, but further away, narrower, and without the strange backwards angle which so annoyed Toobers and let to his most excellent post on the subject of handlebars.
I seem to be agreeing with both Toobers and Fanum about the riding position, trouble is I don't seem to have a solution. Standard seat and higher screen seems the obvious way out. Damn, I didn't mean for this post to be about screens. At least there's no oil in it.