I think the 19 is the most versatile handgun you can buy. How's that for hyperbole.
With that said, its less concealable than the 26 and less shootable than a 17 or 34. But it does everything reasonably well.
A 19 is reasonably concealable and with 15 rounds (even legally in MA) you should not feel "outgunned" by anyone. I've always been a Glock and a 1911 guy. A couple of years ago I was moving towards carrying a 1911. I ended up with a Commander sized gun with an aluminum frame. It was still a bit heavy and bulky. I didn't realize it at first. I never consciously thought it, but I simply passed over the 1911 for my Kahr more often than not.
So I bought a very nice lightweight Colt Officers ACP. The smallest standard 1911 made. One day I was shooting it, with its 6 round magazine and my buddy was shooting his G19. I held them up next to each otehr and realied the Glock was the same size, lighter, and carried more than twice as many rounds.
And I shot it much better. While a Government or even Commander sized 1911 is easy to shoot well, the OACP is not. Simply put, I could shoot the Glock much faster with the same accuracy.
So I sold the OACP (to a very interesting guy, he did protection for Whitey Bulger when he was standing trial last year) to an experienced gun guy and bought a G19. I haven't looked back. It is very carryable, shootable and overall is a great gun.
Don
p.s. I find the 23 (other than gen4) to be a miserable nasty little gun.