Thanks for the info. They also on the "look at" list.
There are some other brands also, such as
Utica (what I actually use; picked up a NOS cheap on eBay some years back), or
Mountz (formerly Stuyvesant IIRC). Not sure of what brands you're considering.
Hope this helps a bit more.
I do like mine BTW, but it was made in 1984 (back when Triangle owned them), so not necessarily representative of what's being made now (since Cooper got ahold of it).
Although the same can be said of Lindstrom (electronic cutters & pliers) after they were acquired by Sandvik (now Lindstrom is part of Snap-On <SNA Europe>, which also owns CDI).
Check the reviews on Amazon for the CDI 401SM I linked (granted, the sample is small, but it does demonstrate that bad units do reach the hands' of users).