Cocked & Locked, that is a handsome gun. And I have always like that style of Remington 38 Wadcutter box.
If you like that Colt, you should look around for a Police Positive 4th Issue. It is your gun with a steel frame, full size grips, and a 4 inch barrel. To me, it is one of the best looking revolvers ever made. Colt did not make a lot of them because they found they could sell all the Diamondbacks they could make, which was the same gun only "Pythonized". The exact equivalent to your Agent would be the alloy-framed Viper, but they are even scarcer, and priced accordingly.