I know I am better with 9mm, enjoy shooting it more, and it is cheaper to practice with...so to me, it is an easy choice. I sold all my 40 hardware and feed. G23 was my absolute least favorite.
in 40 caliber I have a G22 and a G27. Luckily I have a conversion barrel for both
I also have a G20. I also have some 9mm handguns as well. It is still hard for me to get that a 9mm is just as effective as a 40 or 45 using the same ammo. It is easier to shoot a 9mm in the same gun though. I like them all.