...model 10s to choose from. It was one of the most produced revolvers ever and now many people would rather have a semi auto. They don't come cheap, but there are plenty to choose from
And I'm also partial to the 686. I wouldn't worrry about the lock or even MIM parts but I would like to hold whatever I bought, or at least have an inspection period. Of course if you can find one pre-lock and pre-MIM, more power to ya!
For .357 I definitely prefer the 'L' frame over the 'K' frames but there isn't anything wrong with having a 'K' frame .357.