Personally I think the choice of sight is going to be different from person to person.
Everyone has different preferences and different demands for a sight (Demands based on what you will be using for - military/hunting/sports shoot etc.).
Personally I am leaning toward Aimpoint. use an Aimpoint Comp M3 2MOA with a 3X Magnifier in a twist mount - for the option of quickly removing the magnifier when engaged at ranges closer than 150 meters. Personally I haven't had any problems with hitting targets up to and around 200 meters, with the aimpoint. But at ranges beyond 200 I would of course go with a magnifier aswell.
A note on EOTech - I like the earlier sights alot, but I remember quite a few problems with the 552/553 models. The casing for the batteries breaking, and in general they didn't seem as durable and rugged as Aimpoint sights. I don't know if that is an issue with the 557 though. But those issues turned me away from EOTech.
I can't really say about the ACOG, never tried it to be honest.
Iron Sights pretty much covered by you Duty Honer Country...