Thinking about your wants (a companion to your Marlin to shoot lots of .38 Specials), you might check out the Ruger 50th Anniversary Blackhawk. I believe there are still some in the marketplace and you might even get a pretty good price (below 500 certainly). They have all the features of the Blackhawk, have adjustable sights, are blued like your Marlin probably is, and are built (generally very well) on the smaller frame used by the New Vaqueros with a smaller grip frame that is just the ticket for .38 levels of power. I bought two of them, thinking they would be gone in a flash, but they didn't sell that fast and I think you could still get one. If you want fixed sights, I personally would add a few nickels to the pot and get a Ruger New Vaquero, or a Beretta Stampede, in that order.