The only thing that I would add....
Handle the guns first. I had pretty much determined I was going to buy a Sig p226 and I walked out of the store with an HKP30 on order as the one in store was already sold. You really need to hold these things to determine what you like.
The Glocks and Springfields are both fine weapons. There’s a huge waiting list on Glocks at the places I frequent in NJ.
If I were you, just keep an open mind. Pretty much any handgun that runs $500 bills or more isn’t going to be a piece of garbage so get the one you like, specially if it’s your “one shot” approval from the wife.
You point is well taken about taking care to ensure the gun fits the hand well, that when you grip it, it becomes a comfortable natural extension of our arm, wrist, and hand.
I bought a Glock 19 yesterday, but only after the salesman encouraged me try several CZs. I love what I’ve read about the CZs, and I was impressed with the fit and finish when I looked at them close up. But I noticed that when I closed my hand around the grip of any CZ model with a compact frame the somewhat sharp forward edge of the standard CZ magazine would dig into the bottom 1/8th of an inch of the fleshy part of my little finger. I didn’t notice it at first. I noticed only after I alternated holding the Glock. The salesman had no such problem with the CZs but his hand was just t-h-a-t much smaller than mine. The Glock 19 fit my hand perfectly, and I’ve fired one before so I knew what I would be getting if I bought it. So that’s what I got.
I would have hated to have impulsively bought the CZ and only noticed the little finger pinch AFTER I had put a box of ammo through it.