I also have a 66-2 w/3 Inch Barrel. Mine was a factory DAO, and has a Full Combat Package to include Ball Loc and Chamfered Chambers.
I also have a 64-6 with 2 Inch Barrel. Factory DAO also, with a factory action job. NY-1/Brinks Gun. I changed the springs, and now it is as sweet as my custom revolvers.
My Advice: Carry the 66 if you want to. Change out the Original Factory grips for Pachmayr Compac's, and put the factory grips away. The grips are what really gets dinged up carrying a revolver, even if you are careful carrying it. I carryed a 610 for years as a Reserve Deputy Sheriff, and later as Police Chief after retiring from my Day Job. Carrying daily the grips will get beat up some.
Another thing pull the grips any time it gets wet, and regularly otherwise and keep the frame under the grips clean and oiled. I bought a clean 66-1 w/2.5 Inch barrel a few years ago, and it was pitted under the grips. A little TLC, and regular cleaning will prevent that. By the way, I pull the grips now before buying one if possible.
Enjoy it.
Bob