Trijicons are nice, but they tend to be more expensive than TruGlo.
Tru Glos are less expensive, and have the added advantage of being easy to see in daylight, due to them being both fiber optic and Tritium.
Several of my pistols have them as I an buy them on Amazon for $68 a set.
Mine are the TFO's, the Tru-Glo Pros with the circle around the front element are more money.
Depending on the daylight hitting them, Tru-Glos can be a bit distracting, almost too bright.
At night I like the TFOs better, as the front sight is brighter than the back two, and a different color (green in front, yellow in back ) I believe you can get other colors too , like red or orange.
I'm not sure of the price of Ameriglos, as the set I have came from the factory on the pistol (Glock 48).
They are really nice in the day, you see the front sight very easily (red ring around the Tritium capsule).
At night, I don't like the Ameriglos as well as the Tru-Glo. The front and rear dots are the same, same color and brightness.
Not the best pic here of the Ameriglos, as the front sight is in bright sunlight, but you can really pick up the Ameriglo front sight easy in most daytime conditions.

Like Continental Op was saying, some might think night sights are not essential, but I still like having them.
You'll still need a handheld or weapon mounted light to I.D. the target, so having them is moot. But for under $100, it's worth it to me to have them ( I also have handhelds and WMLs).