Lots of options out there in 3". In my opinion, with the compact grips, Ruger's GP-100 .357 3", is one sweet deal. Compared to the new Colt King cobra, the Ruger is less money, only 7 ounces heavier and FAR more rugged and durable. The Ruger trigger smooths out considerably with dry firing / shooting and is very slick. I have had Colt revolvers in the past that went out of time in the lockwork. The Ruger is built like a TANK and will digest tens of thousands of full power magnums without issue. And my Ruger was made in NH, right next door.
Why did I chose the GP-100 3" over the S&W 686 snub? I couldn't find a used S&W 686 WITHOUT a lock. I just hate the look of the hole. So Ruger it is, unless I locate an older S&W.