Just another Polymer thought.. for ya
...
Not on your list but besides my P229/40 being the softest shooting 180gr ammo, along with accuracy with fast follow-up shots is my, a, Beretta Px4 40, right up there in the quality, accuracy, soft-shooting, and half the price NIB than the Sigs, around 450 - 500 NIB, 3yr warranty, 3 backstraps for customizing one's grip, and excellent mags..
2 best, softest shooters in 40cal, along with accruacy (and especially the Beretta's DA/SA trigger-pulls out of the box, in my guns case, I have ever had the fun and pleasure of shooting.
Some 4000 flawless rounds out the Sig and 6450 flawless rounds out the Beretta Px4 40
Luck,
Ls