Well....Certainly all of the models that you named are solid pistols. I have the Px4 and I LOVE it. Given your situation, and your intended use of the pistol, I would probably lean towards the 1911 platform. There are many options available in 9mm for the 1911 frame, which would be smart of you if your primary use will be target. They have a great reputation for "nail driving" pistols. STI makes a great lineup of pistols from the standard 1911 to the state of the art 2011's. There are many other brands that make spectacular 1911's, STI is just what I am personally saving up for.
If you think it is possible that the pistol that you purchase might some day evolve into a carry gun, I might look at one of the models that you have already been looking at. Not that you can't carry a 1911, many people do. I just think certain pistols are better designed for carry duty. This is just IMO of course but take it as you will.
Anyway, good luck and happy shooting
BTW: Sorry to hear about the loss of your father, God Bless.