I've got a Uberti 1858 from Texas Jack's. I bought it on sale; it was one of the last "millenium finish" guns. My intent was to use it as a knockaround gun that I wouldn't fret over like a really pretty one.
The hammer is a bit off-center; the whole cast frame is a bit off. My guess is that the new Uberti forged frames are perfect, though.
But, for the intended purpose, I don't care. It's got an
incredible trigger, right from the box -- best revolver trigger I own, and I have a
few revolvers... My other Uberti, a .357 SAA clone, once I put Wolff Springs in it, is number two. The 1858 quite accurate, right up there with any decent modern centerfire, assuming I am careful when I load it and don't put 20 grains in one chamber and 30 in the next. Even if I do, it's not at all bad.
With a Pietta, you don't get that trigger, and I've seen tool marks in places where they oughtn't to be. Also, the Uberti has a driftable front sight -- not historically accurate, but it sure helps you sight in the gun, when you can move the sight.
That said, I've seen Piettas at Cabelas, and they seem to be perfect. I think that you may just get what you pay for, when you go through a big retailer with large volume purchases from manufacturers, a generous return policy, and a reputation to maintain. Cabela's probably sends back anything that doesn't look right, and the manufacturer won't complain to a huge customer. Maybe they send the rejects to Sportsman's Guide -- not that I have any reason to believe that, I just don't like the place. SG has rubbed me the wrong way, for reasons like refusing to ship a lot of items in California, despite there being no legal reason not to. They definitely have sold some half-ass black powder guns, complete with the usual SG blurb about how great they are.
I'm contemplating the Cabela's revolver -- but I have a Cabela's down the street, here. I wouldn't buy some guns without feeling the trigger first. YMMV