A little update:
I was able to go the LGS (where I plan on buying) and handle/dry-fire the P320c. I was not that impressed, and here's why:
The M grip module was enormously fat, and to be honest, for a "compact" pistol, it didn't seem all that compact. The trigger was okay. It broke very quickly (too quickly?), but did have a very quick reset. I don't like the hinges on my M&P, but I do prefer the trigger pull. The Sig grip module didn't look as chintzy in person. However, I am not in love with this pistol.
They did not have a Beretta APX of any kind, but I did ask about it. They said they got them a while back, and they just did not move at all. Sat for months behind the glass. They offered to order one for me, and said it is a pretty good gun, but warned about the aftermarket. Basically, no one is carrying them, and companies are in no rush to make holsters, sights, etc. I watched a video of the takedown procedure, and it looks strange. Sounds like you have to push the takedown lever out with great strength to break the pistol down. My hand strength is fine, but this seems like a poorly thought-out design.
While there, I also handled a CZP10c. Seems like a good gun, but it is out of the running for me immediately. The grip is too aggressive. If I was going to carry something like that IWB next to my skin, I'd just stick with the M&P 2.0 Compact with it's aggressive texture.
I also handled the HK VP9. It is like holding something special. Fantastic ergonomics, maybe the best I've ever felt. But is out of my price range, so no dice.
Glock (grip angle), CZ (aggressive grip), HK (price), M&P (aggressive grip) are out for me. Which brings me back to Sig 320c, which I'm not that excited about, and the APX Centurion, which is a relative rarity, with it's own undesirable quirks.
Are there any 14-15 round compact carry guns that I'm ignoring? I know I'm being picky, but I am picky. I want to WANT the gun I buy. I don't want to settle for something just because the Army chose it. And I don't want to buy a futureless gun that has no aftermarket support.