A good used Glock 19 in a Gen. 2 or 3 is a great pistol, as is the S&W M&P. It has a lot to do with the fit of the pistol in your hand. What feels good is important, regardless of my opinions.
I carried one as an active LEO and believe it is one of the best 9mm out there. I sold my first one (a Gen. 1) for a model 23 and recently purchased a like-new used 19 from a friend. Won't let this one go. The only 9mm that I think handles almost as good is the Sig 228, which is discontinued.