+1 for AICS-pattern mags over AR type. I had a very accurate and reliable Ruger American Ranch in .223/AR configuration; enjoyed it much more after switching it over to take AICS mags.
I originally got it because I thought using AR mags, which I had already, was a selling point. After a few months of those flippy floppy sloppy things I made the switch (had the AICS mags already as well) and much prefer the solid feel.
I'm toying with the idea of a Bison now; the fact that it uses AR mags is keeping me away rather than attracting me.