My FA M83 454 7.5" with Trijicon RMR. I carried and hunted with N-frame 44's for many years. A couple of years ago I got a FA in 44M and that was the end of the big S&W's for me. It's also a M83 but with a 6".
So when I finally decided to go one bigger, the X-frame was never considered. I really like this 454 as it is a lot tamer than I expected it to be.
Now I've got my eye open for a FA 475. Why, damned if I know.
BTW at 68 y.o., I don't go around thumping my chest unless I'm trying to get some phlegm cleared out of my throat.