If you feel good about the PX4, I say go with that. It fits your criteria, and there is a lot to be said for having a good gut feeling for a pistol.
You seem like you might be a beginner, and if so, the PX4 may be a particularly good choice in .40 because the rotating barrel tames recoil considerably, and .40 can be a bit snappy to learn on. My daughter has a PX4 Compact in 9 mm and recoil is really puny. That pistol has excellent fit and finish to go with excellent accuracy. Overall I find it a very impressive pistol.