The most accurate revolver is a Smith & Wesson 'K' Frame Model 14. Since the 1960's the World Centerfire record has been held by one of these (maybe the shooter had something to do with it too.)
If you want to buy a good revolver now - get a S&W 686 6in barrel. The Universal Soldier - none better, and never likely to be. Oh yes, and get a six shot revolver, anything else is an abberation. A sixgun is a sixgun, not a 7, not an 8. Matches are shot with sixguns not strange orphans with an unnecessary hunchback stuck on them.