Which ignition system to use?

I suppose I got lucky, I bought a new Mallory HyFire-6A ignition box for my Duster about 10 years ago before Mallory got bought out by MSD/Holley group. Still kicking strong, that box is running its 3rd engine now, never had an issue. I went on some pretty long road trips btw, several hundred miles each time and never once had to think about the ignition system giving problems.

Apparently you can still buy Mallory boxes but they look different and are only offered in one or two models, I'm willing to bet they're just rebranded MSD units.