I'd like the Sig 365XL and a Holoson sight. The batteries last 50,000 hours on the Holoson sight and the I love the shake awake feature. Batteries are cheap. I replace mine every January 1, whether it needs it or not and I've never had a battery issue with a Holoson Red Dot.
I have two Sig red dots and I find that where it sits on my pistols it gets dirty fairly fast. I’m not trying be a smart ass, but when my red dots exhibit these kinds of behaviors it’s been a signal that I’m overdue on cleaning the glass lens. If both sides of your lens are clean I’d explore...
I shoot a Sig Sauer P320 X Five Legion. It shoots great and works great in different types of matches they hold at the AGC. It's a heavy large frame gun, which is what I prefer. The truth is that there are a lot of great choices out there.