I'd favor a Ruger Bisley Blackhawk .44 Mag with at least a 5.5 in barrel (Bisley because it's easy to shoot lots of rounds in a single session). I'd actually like it even better in .45 Colt for nostalgic purposes, but if you aren't into reloading or having to hunt for hot .45 LCs, .44 Mag is much easier to obtain at your average store.
As brutal as it is, .44 Mag still doesn't have the level of punishing report as .357 Mag either as measured in decibels, another BIG plus since you probably won't be walking around your farm with ear muffs at all times. Even one of the milder .44 Mags produces energy levels equivalent to very hot, very fast, very LOUD .357 Mag.