My $0.02:
I'm not going to read through three pages for this question, so if it's already been stated, forgive me.
The addition of Night Sights are something that I think are worth the money. You were wondering about having a wider notch on the rear sight. This is a worthy addition, in my opinion. It makes picking up the front sight faster, while allowing you to make those precise shots when you need to. I like the 10-8 Sights myself.
As to the NY1/3.5 Trigger, I'm a fan of it. It gives a more positive reset from my expirience. I have had them on my Glocks in the past, and will again in the future. My spouse prefers the standard trigger, so my Glocks are set up to mimic her's. I don't often carry a Glock, as I prefer other platforms. The NY1/3.5 Trigger harkens back to the days of old when revolvers ruled the roost. It is reminiscent of a revolver's trigger stroke. If you are a revolver shooter you might like the NY1/3.5 set up.
I like that the NY1/3.5 has a consistant take-up without all the spongeyness of the typical Block trigger. If you shoot from reset, which I do, it is a more positive feeling of reset when compared to the standard trigger. The NY1/3.5 is an approved Glock modification for duty use. That means you will be staying within factory specifications with your firearm if you ever need to justify it to a jury. There are law enforcement agencies issuing the same trigger set-up, so documentation on it will be easy to locate for your lawyer to use at your trial.
Give it a try. The worst that can happen would be that you decide you don't like it. It's cheap enough that you should be able to afford to scrap it if it's not your cup of tea.
Biker