Quick Update:
The "Big Dots" work great! Really like them.
I have 600 rounds through the PPS now without issue. The thing points well, and reaches out farther than I can reach out with the Nano. The Walther is looking like it'll be my carry gun. I just have to find some holsters for it now.
The Nano has run flawlessly with 124gr. I still love the thing, but the Walther is taking center stage. The Walther is just that much more versatile. The Nano will be the backup gun. Or the shorts gun.
The Glock is great but no where near as easy for me to carry with me having to tuck in my shirts at work - which is too bad. I'll be trading it in for the Walther's companion piece lol. The full size Walther P99.