I would say a Model 60 would be a fine choice. I dont know that I would want a small J frame in .357 like a 640 but that is just me. If I feel I need that kind of punch, I carry a bigger gun. I would prefer a 642 over a 640 but thats me. I dont shoot my 686 Plus all day with full power loads, I wouldnt want to have to practice with a 640