Before I got my tapping head I was looking at the 30X. Then I got one of the Enco sale catalogs that advertised a Taco brand, HR-1 tapping head, which it turned out is almost identical to the Tapmatic. The thing that made up my mind to go with the Taco was not only the price difference, but more so the collets. The tapmatic didn't come with any collets, and those were an additional $45 each. The Taco tapping head came with 3 collets, and I found out later that the tapmatic 30X and Taco HR-1 collets are interchangable.
I've had the tapping head mounted on its own 10" Ryobi drill press for several years now, and to date its tapped literally thousands of holes. Probably the biggest thing I've learned about tapping heads is that it takes a bit of "tinkering" to get the clutch set correctly, but once you get it there, you will wear taps out instead of breaking them. The biggest advantage for me was being able to use thread forming taps with the tapping head.....versus having to use cutting taps when hand tapping. (I suppose a person could use forming taps by hand, but for me it was frustrating, breaking them all the time)
Obviously Tapmatic is the "standard" of tapping heads, but I've been very pleased with the Taco. Either way, if you're making folders, a tapping head is the way to go.