Any time someone asks about AR optics, the ACOG and Aimpoint come first, last, and most often. BUT, bBefore you sink all that money into what is without a doubt an EXCELLENT combat optic.... Let me make a less expensive, quality suggestion...
Burris Fullfield II 3-9x40 with Ballistic Plex ($200) or illuminated Ballistic Plex($300), and an Armalite 1 piece scope mount ($75).
Burris at SWFA
Given your intended uses, you're not going to neccessarily need a scope that will survive a "5 meter drop onto concrete". Also, some of those uses (varmint hunting for instances) might actually be a compromise with the ACOG. And while you may get what you pay for, there comes a point where every extra $100 does not continue to give the same percentage increase in extra quality. In other words, a $500 scope may be 10x better than a $100 scope, but a $1000 scope is NOT 10x better than a $500 scope.
I've done a lot of research, and the Burris is a quality optic.
Another suggestion might be the IOR Bucuresti illuminated 4x24 M2 in one of the several reticles they offer.
IOR at SWFA
For plinking and non life-or-death situations, unless you just have $700 laying around to spend on a scope, there are plenty other options that would absolutely serve you just as well.
Good luck.