Got the itch for a big bore revolver. Been thinking about either the Ruger GP100 or a Blackhawk. Either would be a minimum of 4" barrel. Stopped in a gun shop I occasionally go to and they have a whole collection from a guy who is selling a bunch of early 1970's NIB S&Ws. One of them is a Model 28. Never been fired and it has a $625 price tag on it. All three of these fall in the same price range. Which would you go with either the new now Ruger or the NIB S&W?