Sights have been touched on in numerous threads but I failed to find what I was truly looking for. I'm looking to replace the sights on my 509 and eventual 19X and before I go burning through money trying different sights I was looking for input. I saw a lot of "I use these..." but not as much "this is why" attached. I understand that there is a large portion of this forum that gets issued sights and that's what they get to roll with, but for those that have run with other sights what are your preferences and WHY? Where do you like your point of aim to be in relation to point of impact? What yard line do you like them to zero at? What manufacturers are there to avoid? Are there factory irons you don't feel the necessity to replace? I spend more time around gamers now than I do gun toting professionals now, so if my questions are too granular let me know. My scope for iron sights is very narrow. I've used Truglo TFX sights and played with Trijicon HDs, everything else has just factory, including my 509 sights. For reference, I have no leanings toward nights sights or fiber optic, I just prefer green/yellow in regards to color if there is color added to the sight. I don't use NV and I have a white light attached to my gun.