Yes, the question was which 'caliber' not which revolver. That said, most of my experience is with the .357 magnum so I would recommend that caliber. There is such a tremendous variety of ammunition between .38 special and .357 magnum. The same can be said for the .44 magnum/.44 special calibers. I'm not sure why the writer said the revolver would only get fired a couple of times a year.
Hard to argue with any of that. Mine is a 3" SP101 in 357 with CTC grips. Compact and surprisingly accurate. Whatever you decide you need to shoot it more than a couple times a year if you're gonna rely on it.