Let me say my CW9 has more than 500 rounds and is a great carry pistol.
I like the 9mm because I handle the recoil better than .45 or .40 caliber. In fact to me the .40 has more muzzle flip than .45. Lighter pistols will have more felt recoil.
I added a Hogue Hand All Jr. slip on grip. I did that because the grips on the CW and P Kahr pistols are too abrasive for me to shoot a 100+ round range session. The slip on really makes a comfortable shooting pistol for my CW9. I have shot the CW9 with and without the slip on and discovered that in addition to saving my hand it improves my overall grip of the pistol.
Shoot several models if you can before making a choice. Good luck in you quest and welcome to the forum.