If you train a lot you can run an ACOG for CQB work up to about 3x-3.5x. Over that it starts to get a lot more difficult and in general slower then a non-magnified optic. An aimpoint on the other hand has no capability for target discrimination or magnification. In a SHTF situation having the ability to determine what is a hostile and what is not (or if it's a hostile worth engaging) can be a life saver. An ACOG gives you that capability, where an Aimpoint requires adding a magnifier possibly.
I've run both a non-mag optic (EOTech, but similar concept as the Aimpoint), and an ACOG on my work rifle (LEO). If the ONLY thing I was going to was going to be going into small structures, I'd take the EOTech every time. However as that's not even close to my general job description, the ACOG gets the nod. The ability to gather info, target discriminate, and still go in close and take care of business is huge.
I personally would recommend the the TA11-H for your purpose. It is quiet a bit pricery though, an Aimpoint with a magnifier will do largely the same thing just at more weight and bulk.
-Jenrick