I have a Model 19 reverse pinto, 357mag 2 3/4 in barrel with the paperwork from the [email protected] Historian. About two dozen shots thru it and then with a wadcutter target load. A very unique (5 were made of this order) weapon. $1500.
Dave is selling that 4" Model 66-2 for a very reasonable price. I have the same gun with target trigger, hammer and trigger stop - it would take more than that to get it from me as I paid that much for this one five years ago!
Unless you're planning to run endless amounts of heavy magnum fodder through it, a K-frame like a Model 19 or 66 will serve any purpose you desire and will appreciate in value doing it, as they are no longer made.
I have a S&W Modl 640 .357mag, 2 1/8" brl that I bought new about 20yrs ago and have shot very little mostly .38spl ammo. It had it Magn na Ported, and the action polished and tuned and the trigger face polished. I recently added Diamondwood Grips. LNIB $600