My pick would be the CZ P07 as well. Mine has served me very well. The only things I did to it was installed a couple CGW parts and a little polishing and the trigger is excellent. I also had the small back strap textured (not seen in the picture). Someone said sights are hard to find, but I run the factory CZ night sights and they are excellent. They are hands down the brightest night sights I have ever seen! I have a P01 Omega UG/SR and it is excellent as well. I just run the P07 a little better. However, if metal frame is a mush, the P01 is amazing as well.
As for the PX4 Compact, I am sure it is an excellent handgun as well. I gave one a try, but the DA trigger reach was a little too long for me.