I own all three,right now.
I was a long-time AR guy, then during the past few years, became a bigger fan of the AK, and sold my AR's. Then, I decided to get something chambered in 223/5.56, mostly because I still had a bunch of ammo, so I got a stainless 580-series Mini-14.
THEN.....I saw the AIMsurplus deal on the Spikes middy, and ended up assembling another AR.
Full circle, and all that
.
I'm confident and comfortable with all three, and they all have their better and lesser points.
( -AK irons DO suck, and so does their ergonomics with commie stocks, but the x39 round is way better at penetrating brush and barriers.
-AR's can be a little finicky,but their unreliability is way over-exagerated.
-The new 580 Mini's are noticably more accurate than the older models,their new iron sights are excellent,but they pretty much require factory magazines that are fairly expensive, and not as common as the others.)
If the SHTF, and I was out patroling my AO, I'd likely have one of my AK's with me,over the other two, but I'd be nearly as happy to have my AR or mini.