If I were looking for a current-production general-purpose revolver, I'd go with a 4" blued GP-100 with the non-underlugged barrel and adjustable sights. Then I'd send it to a good 'smith and have a "duty" action job done and have it made DAO. Then I'd try my best to wear it out.
3" revolvers may be marginally easier to conceal, but with the prices they're going for now, the juice ain't worth the squeeze IMO.