Dang! It's hard for me to say this, but I wouldn't do it.
The Virginian Dragoon was a fair single action .44 Magnum revolver. The Smith & Wesson Model 19 is a superb double action .357 Magnum revolver.
Of all the single action revovlers, I like the Dragoon the least. It's a good solid, stout built sixgun, and capable of good accuracy, but not in the same ballpark as a Ruger Blackhawk/Super Blackhawk, nor the Italian clones.