This thread is going to be very biased
I'm an M&P owner here, sooo........
I've got over 1500 rounds through my M&P Fullsize 9mm, zero failures to speak of. Feeds 9mm slugs of all weights. The trigger is Glock-like, and takes getting used to.
Aside from that, I would trust my life to it if I ever had to defend myself.
The XDm is a great gun as well. Of the three that you listed, you really can't go wrong. Keep in mind, the S&W will probably be cheapest (and made in the US, and have a lifetime warranty). The FNP may also have those characteristics. The Springfield isn't made on US soil, and may not have the lifetime warranty.