I've only had cap and ball single actions and a few Vaqueros (four so far, only one left) and a few modern Rugers thrown in. But I had the itch for some SAA replicas lately, and I just happen to have fallen into three. Not an easy thing to do here in MA, since no new ones can be sold by a dealer here since they are not "compliant".
The first one I picked up was an Uberti, 4-3/4" barrel, CCH frame with a nickel plated gripframe. Nice shooting gun, but I did have that peening problem mentioned by someone else in this thread around the firing pin. I little bit of filing one time and the problem went away. I guess the parts did wear themselves in.
The second one I found was a Cimmaron Arms, still NIB, but I have the original papers from when it was bought in the early 90's. It's another 4-3/4" barrel, CCH frame with a brass gripframe. It came with 2 cylinders, one in .44spl (the only one I've used so far since I handload for it) and another in .44-40.
The third is another Uberti. This time it's a .45 Colt, 4-3/4" barrel (see a pattern here?), CCH frame, blued gripframe, but it has the older blackpowder-style frame. I found the grips to be slightly wider, too.
The one thing I've learned about them is they are just like the cap and ball replicas. Stock spare parts for them. I'd recommend spare triggers, hand/spring assys, bolt and trigger/bolt springs. I keep two on hand for every replica I have. I've lost count of all the times I've had to replace parts on my old CVA 1858 Remington .44. And, about a week into shooting the SAA replicas, I broke a hand on the first one I got. The parts require fitting. My first attempt took me about 2 hours and I had to scrap the part. Learning from my mistake, the second attempt took me about 10 minutes and worked out perfectly.
Enjoy shooting them. At times, I have a lot more fun shooting my SAA replicas than I do training with my modern guns. I've already started making a double gun rig. I made the patterns for the holsters, but I still need to sit down and saddle stitch them and make a belt. If leatherwork isn't your thing, check out this site for holsters. I've heard nothing but great things about him:
Holsters