a few years ago i was commenting to a friend i wanted a smython.
So he had one built. Took a model 19 frame, had it tuned, and had a colt python barrel screwed on it. Then it was sent back to fords for refinishing. The day it was taken to the range, a rather well known gun writer, lots of N.R.A. articles from that guy, got a chance to shoot it, and it went home with him.
The only issue is have with the 27/28 is they are bulky and heavy. But will take a lot of punishment.
The 19's are much better in the carry department, but not really designed with the idea of heavy and continuous 357 loads.
I have a number of 19's new in the box that have never been fired, and probably never will at least by me. I like that model of revolver. But i have progressed to those shooting the .4 caliber more. I would much rather have a .41magnum, .44 magnum, or .45colt than a .357
