You want something authentic and built to last? Why not get a 2nd Generation Colt 1860 Army? Natural pointers and lighter than the reproductions.
If you prefer the Remington style, you cannot go wrong with a charcoal blued Uberti Remington New Model Army.
There are several sets of 200th Anniversary United States Cavalry Colt 1860 Army revolvers with shoulder stock and accessories on GB right now. Shoot one and look at the other!