Hello!
Personally, I think S&W makes the best DA revolvers ... I have 6. Granted, all of mine are older (virtually all of my handguns were made prior to 1980), my Smith's are "mission specific", back when S&W catered to competitive shooters.
My "K-Masterpieces" have the smootest actions I have experienced, and they should since they were made to be competitive in the rimfire and centerfire stages of NRA 3 pistol bulls-eye matches.
My "N" frames are a pure delight to shoot ... I have a much older long barreled .357 which holds its own on the 200 meter rams in handgun metallic silhouette, and my .41 is a pleasure to shoot.
Ninety-nine times out of a hundred, these revolvers are fired "single action", but for when the need arises, thay have the most "buttery smooth" double actions I have EVER experienced (except for the occasional Python). I do have an older Colt Trooper MkIII, just because I had to have it, but when shooting double action, the pull is not as smooth, and the "stack up" as you bring the hammer into battery with a double action pull of the trigger is noticeable (unlike a Smith). I attribute this to Colt's use of a coil mainspring as opposed to the flat springs that S&W uses.
Additionally, back before I was content with my handgun colletion, S&W was the ONLY manufacturer that catered to customer demand and offered a major "sporting" variety in their catalog, everybody else took the Henry Ford approach and offered handguns that had very distinct military or police heritage. At the same time, Ruger was just getting started in the DA market, and had only the Speed Six and the Security Six, offered only in .38 or .357. Colt offered DA revolvers in .38 Special or .357 Magnum, and a few were still available in either .32 New Police or .38 New Police. However, S&S offered a gamut to choose from: .22LR, .22 Mag, .22 Jet, .32 S&W Long, .38 Special, .357 Magnum, .41 Magnum, .44 Special, .44 Magnum, and .45 Auto Rim.
Just as a quick aside, NONE of my Smith & Wessons has EVER been in the shop for a trigger job.
Good luck and good shooting!