Old style with modern refinements. I finally have my 1875 Remington (44-40 WCF) by Cimarron, but I chose the 5.5" as about as long a barrel as I would ever carry, straight up or cross draw.
FYI, this style gun by Remington was one of the later responses to the Colt Peacemaker, a very similar gun but retaining the webbed barrel of the black powder guns and conversions. It supposedly was Frank James's choice, with his in 7.5".
Of course, that opens the can of worms of supplying for loading a new caliber and finding that I somehow "need" a rifle in the same caliber, the 44-40 WCF these days listed under rifle calibers.