My $.02: The Glock does not point naturally for me. BTW Glock is 250,000 pistols behind.
The XD(m) is very comfortable, holds 19+1
and the interchangeable backstraps allow you to custom fit the grip.
The PX4 is very comfy(haven't shot it though) but the external thumb safety is a "flip up" to fire. I'm used to "flip down" a la 1911.
BTW IMO the XD(m) is a great value. You get the holster, mag pouch, thumb loader, and bore brush.
If I was in the market for a well priced polymer, it would be the XD(m). Good luck.