I think you will be happy with the Uberti. I would look at the others too like from Cimarrron, Taylor, Traditions and especially Dixie Gun Works. No matter who you buy from most of the replicas are made by Uberti or Pietta in Italy.
Just to toss my 2 cents into this. I have a variety of peacemakers in my collection, Uberti Cattleman (sold by Stoeger), a Uberti engraved Cattleman from Taylor's, A Cimarron Thunderball 8 made by Pietta, an Armi San Marco (no longer made) and of course a 90's Ruger Vaquero.
All the Uberti's are nice, but will probably need some work to get them nice and smooth. If you get a Cimarron one, it will probably come already slicked up, but Stoeger and Taylor's don't seem to have any work done on the action. The Stoger in particular needed quite a bit of work on the hand channel to remove the burring, the Taylor just had a pretty crappy trigger pull. Replacing the springs with Wolff springs did the trick.
The Cimarron came with a wonderful action, and the Rugger, I bought used from someone who had it tuned, so I never had to fool with it.
A word on finish. The Uberti case hardening colors are not as nice and vivid as some of the Colts, or USFA. In fact, the Cimarron Thunderball, which is made by Pietta, has beautiful case coloring, superior to the Uberti. The ASM does too. However, the bluing on the Pietta, while beautiful and rich, is very thin, and will get scratched by simply looking at it. The bluing on the Uberti's is very sturdy.