In this caliber, I have Lee, Lee oversize, RCBS, RCBS Cowboy, and Hornady. I even have one that is a custom die by Lee for one of my .45 Colts that has 0.458" cylinder throats. For a guy with one set of dies, the RCBS Cowboy are hard to beat: two expander plugs, one for 0.454" bullets and one for 0.452" bullets.
Unless you have an old gun with generous chambers or an Italian clone with large throats, the RCBS Cowboy will be fine.
Remember that this cartridge has a 100+ year history and there is quite an allowable tolerance on ammo for it, due to taking old guns into consideration. If your gun is modern, practically any set of dies will do.