Here is an opinion from "don't know beans".
I am getting back to DA's because of a lot of things---suffice to say I played with SA's for many years in my youth. I really didn't know beans about what I had---I was just glad I had whatever it was that I had at the time---no direction just shooting.
I have has a J frame with the locks for a number of years now. The lock is not the problem, It is the Scadium flavored .38/.357.
The J-frame has never fit my hands and I really don't enjoy shooting it all that much---but I do shoot it on a fairly regular basis, It is DAO and i don't care for that. Trigger is good but I like DA/SA's much better and like SA's better than DAO's.
I found a 28-2 just recently- The large frame is a joy---I have always preferred large and heavy in pistols. Just steadier in MY hands.
I like the 28-2--it is a big solid handgun--it is a 1978 issue--and has no lock.
I am getting in the market for a .45ACP, looking for a used---would like a blued gun--the28 is blued---but would not objetto a shake and bake finish on a stainless.
I don't cre for the appearance of the lock---but is not a deal killer for me when i go to get it.
Blessings