If you are planning on SASS (cowboy action), please figure out where you want to complete.
Different classes require different rifles.
The Classic categories require a rifle of 1873 or older vintage.
The MIJ Winchester Miroku is a fine piece, but pricey.
This class also dictates .40 caliber or higher and exposed hammer 12-gauge shotguns.
I have zero interest in any of that, so I favor the more modern categories.
I have 357 Vaqueros, a new 1894CB in 357, and hopefully a Stoeger coach gun before the week is out.
After the weapons, comes the clothing, the leather, the hat, the spurs, etc, etc, etc if you want to shoot SASS.
If you want just a cowboy rifle, my new Marlin is production of January 2019, and very nicely made.
I have zero interest in 44 or larger calibers, so mine is 357.
Many of the shooters comment that 38SP is best loaded "long" for better feeding in 1894s.
Read a lot, buy once, cry once.