I have a S&W model 13, blue, round butt, 3" heavy barrel. The model 65 is the stainless version of the 13. The only reason this came up on my radar, a friend of mine was an FBI agent back over 35 years ago. It was his issued weapon. The more I thought about the 13, the more sensible having one became. So after a few months.......or weeks of thinking I finally had one. Not too big or small and the 3" barrel is a great option for concealed carry.
One thing to think about is repair in case you get a vintage handgun that the factory no longer supports. And sometimes parts availability is an issue. Lots of good info in this thread. The hardest part may be deciding on what to purchase!