I really like the standard Trijicon night sights... like this:
h...ttps://www.trijicon.com/na_en/products/product1.php?id=BNTNS
These are exactly what I am after in a sight, sight picture, etc. Basic. Symmetrical. You can line up the tops of the sights, or the dots, both work. The dots are all the same size. They work well. Accuracy improves (certainly over the stock sights). They are tough and I've had no problems with them. You have to blue loctite the front (screw on) sight, but that is true of all screw-on front sights.
Some people like the newer "Trijicon HD" sights, like this:
h...ttps://ww...w.trijicon.com/na_en/products/product1.php?id=HDNS
"...these sights have a yellow or orange photoluminescent paint outline and tall blade on the front sight to increase visibility and quicken sight acquisition. Additionally, the front surface is steeply hooked to assist in emergency one-handed slide operation."
Basically, they are a bit taller and the front sight looks bigger. This is not what I am looking for, but others are.
There are an almost unlimited number of choices for GLOCK sights out there. These are probably two of the better choices.