Check out the NEW Glock 45 (Gen5) which is a G17 frame with G19 slide.
IIRC this is the G17X. I was going to say that there are only 2 things better than the G19- one is the G17X, the other is the G23. Of course this is just my opinion. The Glock grip frame and grip angle don't work for everybody. I'm a little suspicious of the M&P after my experience with the M&P Shield.
Dave one redeeming thing about the M&P is the .45 has a smaller grip, I have small hands and have no problems with trigger reach, etc. It was a good choice back in the day when I could handle the recoil. My days of shooting heavier calibers is pretty much done, due to issues with my hands/elbows. I would love to see a 19 sized single stack, that would be a soft shooter with a trigger reach I could handle. I have a 43 but don't particularly like it, the 19 is pretty close to a perfect sized pistol for a 9mm.