So folks! I'm building my first AR (PSA lower, and 14.7" middy upper) I want to put a good red dot optic on it as well. I've got BUIS already. I have a lot of experience with the Trijicon ACOG from the M16A4 I rocked while I was in the Marine Corps. I wouldnt mind running a traditional ACOG, but i've recently been really interested in the Aimpoint M2,M3,M4/ Micro T-1, H-1 and the EoTech series like EXPS-3. What are all your thoughts and opinions?