Hi Harry & welcome.
I'm 6'2, a peg lowering kit is worthwhile, I have a Givi Airflow and while this seems the best option that I've tried, I still get a light buzzy trembling kind of turbulence at motorway speeds that becomes annoying after a while - so not a one stop fix for me but I'm still tinkering with it.
The winglet deflectors do make a surprising difference at removing wind to the upper body & are quick, cheap and simple to make and bolt on, details are over on 12-16 section on stromtrooper.
Now - the mirrors, I tried the BMW/Aprillia shaped knock off mirrors. To me they offered no noticeable improvement in buffetting/turbulence (although they look like they should be better) but to me, the rear view from them was dreadful compared to the stock Suzuki items, which I find the best in the class for giving a good wide view
I don't have mirror extenders but may make something to raise & push them out slightly for an even better view (but keeping them no wider than the bars for filtering). I very much doubt you would be impressed by the smaller mirrors if you find the oe ones lacking - are you sure they are oe and not already been changed?
I do find the stock mirror ball joint has very limited adjustment and the stems need positioning 'somewhere near' on the threaded mirror stem, using the mirror end ball for fine tweeking (if that makes sense).
We are all different and I seem to stand alone in my dislike of the smaller aftermarket mirrors!!!
Regards Phil