The more I shoot the 43x, I see pluses and minuses. With more shooting, I think I can certainly improve. For now, I don't see going from a 19 or even 17 to the 43x.
My 43x is currently "in the shop" to get the grip laser stippled, including the trigger guard. I am wondering if a little more grip texture will help, but overall I think the grip is a little small, particularly the width. Definitely will continue to shoot the 43x, including hopefully in a match.