OK, I'm a little late to this discussion, but here is what I know:
Southco makes two styles of Pop-Out cabinet latches, model
M1-2A . Both of them are mostly plastic, with some stainless hardware. Both push to latch the button in, push again and it pops out for access. Both will lock the cabinet when the putton is in, stated working strength is 50-70 lbs. One version requires popping out, then turning the (knurled) knob to open, the other is smooth and you just pull once popped out to open, it just has an indent feel. Its a pretty nice latch, but plastic. Far better though than the one referenced above from Rockler (my opinion). They aren't terribly expensive, I think you can get them from McMaster.
The one referenced above from Reids is a Southco
M1. That particular varient is plastic, however Southco makes the M1 in 316 stainless, and it is a very nice (and not cheap) latch. Stated strength is 122 - 262 lbs. depending on which size. These work well for cabinet doors in small sizes, but the pull is inconvenient for a drawer, maybe would work in the medium or large size (but they get pretty large for a drawer front). There is another version than is a cam action toggle latch (rather than a slam latch) and works well for exterior doors as it will cam down the gasket.
In the Pop-Out latches, the most secure one is the one you must twist. If you have some of those, I recommend going with all of those rather than mixing. I mixed and it becomes confusing - even after a long time - as to which you are dealing with when you grab a pull.