I agree with sticking to factory mags. I add to the one I have when I find factory ones for my Huntsman and commander. Also stick with factory mags for my Sig and Ruger.It's hard to beat Colt factory magazines.
Personally, I always bought the original seven round mags, not the eight round, simply because there never seemed to be any issue with the sevens.
Lots of other companies make all kinds of "enhanced" magazines with all sorts of features like removable floor plates and bump pads on the bottom, but the Colt factory still seem to give less trouble than any others.
The price of genuine Colt mags is also good, especially if you shop around.