Although I have 5-6 AR's, I don't have any sighting system I am fully confident in. Half are running carry handle irons, which I like but are not optimal in low light. I have a Sightmark on my main gun, but it's really not so great, and washes out in full dark conditions. What do you guys suggest? ACOG, Eotech, Trijicon irons? In my area a shot past 200 yards is very rare.