After looking around at various websites and reading a bunch of reviews, it appears magazines are a lot like most mechanical products - they all work well unless they don't.

I went ahead and ordered a Wilson Combat ETM 10 rounder, the best price I found online was only about a Burger King Whopper's worth more than a lot of others and it has solid reviews everywhere you look. If it works as well as folks say for various brands of ammo I'll get another one or two.

Also ordered a 1911a1 aligner insert for my Maglula. The Maglula works okay on single stack mags without it but can be a bit awkward.

Gunnery, gunnery, gunnery.
Hit the target, all else is twaddle!