With regard to the 43x I have similar 9mm carry guns (Sig P365, G26, Hellcat Pro). I also have the larger G17 which I feel quite safe carrying and did use it in a bear defense in 2022 down in Southern Oregon.
The G23 is a GREAT gun that I don't own yet. It is the same exact size as the G19 but packs more punch. I have a G20 and the smaller G29 for when I am in Grizzly country.
With regard to the 180g XTP all I can say is that it is a VERY under-rated projectile. Hornady designed it to be a controlled expansion which means deeper penetration than a standard HP. You can watch penetration tests on Youtube and the XTP does not fragment or separate from the jacket and gives great penetration but needs to be pushed hard to get full expansion. Some don't like it for personal defense because of the deeper penetration. I must admit they have a point there, but I am NOT as concerned with over penetration and it makes the XTP great for Woods Protection. Underwood makes the 10mm with the 180g and 200g XTP and they are loaded for full power. I carry both of these with confidence in my 10mm's. Obviously the 40 S&W shoots the same projectile except it is slower (but has less recoil too). The G23 is a great setup. I need to get one.