I am 6'4" so I feel your pain. All of those little guns feel very small, but with a little practice you get used to it. I've shot both the G42 and G43. They are both good guns and shoot very well. However, like any other Glock, I would change the sights out. The factory sights suck. I shot the G43 and the XDS 9 one right after the other so I could get a good comparison between the two. I preferred the XDS a little over the G43. For some reason it felt better and I was more accurate with it. Of course your results may be different. My buddy I was shooting with preferred the G43. If you are getting the LEO discount, I would pick one up for sure.
STI