Just posted this in a another thread - the 66 3" is a winner - I prefer it to the 3" 13/65 or 10/64 ... but I was lucky enough to pick up a couple of those this last year:
...note the 3" 547 9mm in the upper right corner -- now *that* is a 3" K-frame I like as much as the 3" 66! Very accurate -- I've done some relatively long-range shooting (75 yard shooting at a 1 liter can) with it out on some nearby BLM land and it really surprised me.
The other two are a Model 64 and model 13.
--Neill
ETA: oh what the heck - may as well include the 3" Model 60 which I love; picked it up from a friend along with the Model 64 pictures above. This a fun little shooter!