As you can see, it's all about personal preference. I absolutely love the G19. With that said, I carry a G26 with a factory +2. To me, it's the perfect CCW. The +2 gives me great purchase, but prints less, and carries easier than a G19. I have large hands and the +2 makes all the difference for me.
Also, FWIW, I personally wouldn't trade a G4 anything for a G2 anything. Yeah, the 7 magazines sweetens the deal, but I'd rather have a G4.