Love my ACOG. I would take that over magnified Aimpoint any day. I own both, but my Aimpoint is unmagnified.
I have one of each, and love the both. The Aimpoint gets the win for quick and easy target acquisition at close range, as you have literally a point and click situation. Put the dot on what you want to shoot, and pull the trigger and shoot it.
The ACOG is awesome when you start adding some distance (say > 100yds) and wanting to keep quick target acquisition but have some precision to your shooting. Great glass, and the 4x and chevron (or other reticle) give you the advantages you would expect from a lowerpower scope.
I hate to play the "What are you going to use the rifle for" card, but that probably defines what optic you should go with. For general plinking inside of 100yds and the OMG SHTF Zombie home defense gun, the Aimpoint is my vote. I would suggest the 2MOA version, as the 4MOA will mean that anything less than 4" will be completely covered by the dot at 100yds, and when you magify you'll have a less crisp dot that you would with the ACOG.
If you want to still have a good optic for the Zombi-pocalypse, but also like to stretch out past 100yds, the ACOG is the way to go.
dont rule the ACOG out though. i have mine zeroed for 50 yards (instead of 100 meters) and it brutally accurate. it will just take practice to get used to it. rapid fire plinking allowed me to do this (which is awesome for me...as my equipment far exceeds my ability to use it ) :
While everyone has their opinion and he supports the ACOG as well....I would have to disagree in that I have engaged targets as close as 30 yards with an ACOG and with/without NVG's...and had NO PROBLEMs with target acquisition regardless of range...of course it will depend on your own eyes, skill level, and training level....anything under 40 yards if you train properly you barely need to use sites at all and should be able to effectively hit center mass with muscle memory...if not, then you aren't as proficient with your gear as you should be IMO....regardless, it's a matter of preference anyway and going to depend on your own eyes...which mine are pretty fuzzy and I never had a problem with the ACOG..........I NEVER came across or thought of a scenario where I would prefer eotech to ACOG for anything...I'm simply not a fan of them