It depends ... on you and what your perceived needs might be, as well as your revolver skills ...
When I was first looking for a SP-101, I was looking to replace a nickeled 3" S&W M36 Heavy Barrel .38 Spl I had foolishly traded off. That 3" J-frame was an excellent shooter, and I wanted a similar small-framed 5-shot 3" wheelgun chambered in .357 Magnum. I'd had enough larger-framed .357 Magnum revolvers over the years, and wanted something a bit smaller and lighter chambered in that caliber to carry for a while. A 2 3/4" Speed-Six wasn't really all that much different than a 4" Security-Six or Heavy Barreled Service-Six when it came down to off-duty usage, and I'd liked the SP-101's I'd handled and shot. Just enough smaller because of the smaller frame and 5-shot cylinder.
I wasn't able to find a 3" SP-101, so I settled for a 2.25" DAO model. Handy little 5-shot Magnum. A bit heavy, and the only pocket carry I ever used was in either a heavy jacket or an insulated vest in cooler weather. I consider the SP-101 to be more of a belt gun than a pocket gun. When I want a pocket revolver I use my 642-1 Airweight.
I don't much carry the SP-101 nowadays. I still qualify with it and practice with it, but I generally carry either a lightweight compact/subcompact pistol, or an Airweight J-frame. If I had it to do over again, and were looking for a revolver to use as a general-purpose, reasonably sized, "sometimes" off-duty belt gun chambered in .357 Magnum ... I'd look for a 3" SP-101.
I used to carry a full-size .357 Magnum service revolver (a M66 and then a M686) off-duty, as well as other personally owned revolvers of that size and weight. I was more willing to accept the weight and concealment compromises back then ...
When it comes to carrying a steel revolver as a belt gun, though, there are some really nice options nowadays.
If I were going to consider going back to carrying a revolver for all of my off-duty needs again, I'd seriously consider either a 3" GP-100 (probably with iron sights) or a short-barreled S&W 686+ 7-shot, and get a good belt holster ... or simply drag my MagNaPorted & Duty-Tuned 4" Service-Six Heavy Barrel, which has had the grip-frame reduced to a round-butt profile, out of the safe.
Something to consider with the short-barreled 5-shot Magnums is that not everyone shoots them well. If I wasn't able to wring the necessary accuracy and controllability out of my various J-frames and SP-101, I'd return to carrying a larger 6-shot, medium-framed revolver with which I could shoot well.
The .357 Magnum Airlite Scandium-framed Magnums don't appeal to me in the slightest. Not after shooting 125gr Magnum ammunition through some of them.
You ought to try and find one to try out at a range somewhere.