I carried a 43 for a while and never saw the need to go to a 43x. After I held one and shot it I switched to the 43x almost immediately. I will say the 43 concealed a little easier but the grip on the 43x was worth it to me. Try to shoot both before making a decision.
I like the plain 43. Anything larger defeats the purpose. The 43 disappears under a t shirt and shoots almost as good as a full size glock. Want a bigger grip or more ammo stick a longer mag in it. Done!
I like the 43 with Taran Tactical extended mag bases. It’s been fun tricking it out with true precision barrel and agency arms trigger but it was good out of the box for me.
I owned a 43 and a 48, bought a 43X and immediately traded the 43 and 48 for two more 43Xs. All things considered, it's the best CC option out there for my preferences.