I'm a big fan of the Ruger single actions. Note that they basically have two frame sizes, the standard Blackhawk that is fairly large (larger than a SAA) and a slightly smaller one that is closer to the original. I have one of each, the large frame in .45 Colt and the smaller frame in .44 Special. The smaller one, most recently represented by the "New Vaquero", is available in the calibers you want. It's only limitation is that it can't handle the "Ruger only" .45s that some of us load. If fun is your goal, you don't want to bother with those knuckle busters anyway. I like both, but favor the handy smaller frame.
Colts are wonderful, and those folks are very proud of them. Worth the money? Only you can say. The USFA copies mentioned can be found used. Also pricey, but considered by many the best replica.
I got a Cimarron (made by Uberti) Model P last year. Completely traditional (4 clicks, you know), very nicely finished and a great shooter. The Italian copies are the least expensive, of course.