I have a Colt Trooper MK III, S&W 66-2, S&W M19, Ruger Security Six, and a DW 15-2V. I love them all and shoot them all regularly. They are all accurate since I adjust sights until they are correct. Drives me crazy to have a gun that is not accurate and sighted in. I have only had the Smiths for about a year and the Dan about the same amount of time. I wanted a Dan since 1979 when I purchased the Colt and passed on the Dan. The Dan is very accurate, smooth and a very nice handling gun with the 6" barrel. I took my brothers out to shoot them all and they loved the feel of the Dan. The 66 is very nice as well but overall I would have to go with my Dan but there can be so much difference between one hand gun and another of the same model. Smiths are pretty hard to beat for their overall consistency, something the Dans are missing.
The DW's are getting harder to find in good condition and bring a premium. I am a few years to late to this party.