Recently I, too, decided to buy a revolver, after many first-quality semiautomatic purchases. I received lots of sound advice from TFL members. After much consideration, I thought I'd refined my options to either a four-inch, all-stainless Smith 686 or a four-inch, all-stainless Ruger GP-100. I am convinced that both are excellent revolvers, with a general feeling that the 686 might have marginally better trigger pull/feel while the GP-100 might be slightly more durable.
However, I then discovered the Smith "N" frame revolvers. These -- like Ruggers -- have greater density/mass and are supposedly more durable than the 686 ("K" or "L" Frame, I believe), but still have the "sweet" trigger pull generally associated with S&W. In sum, they provide the best of both the S&W and the Ruger worlds. In addition, they are available in a wide variety of barrel lengths and calibers.
I selected the S&W 627: all stainless, five-inch barrel with full under-lug, "Special Edition", gold-dot sight, in .357 magnum/.38 Special. It is a WONDERFUL firearm -- very accurate (by far the best groups at 50 feet I've ever shot), great grip, beautifully manufactured, stainless steel forgings that are superbly machined, extremely reliable and durable, rock solid, easy to maintain, and guaranteed for life by S&W. In addition, the .357 magnum/.38 Special accommodates a very wide variety of rounds for many purposes.
Therefore, I recommend you consider Smith "N" frame revolvers. They are available in virtually all revolver calibers as well as in .45 ACP (model 625). I believe they may be the best available.
[This message has been edited by RWK (edited March 08, 2000).]