Marshal, I thought about that combo you mentioned, with a Lightning in cross-draw. Even went so far as to buy one of the "sheriff's rig" setups, prior to buying the revolver.
I was already shooting mismatched revolvers: a Bisley Vaq and Blackhawk. A couple of pards I shoot with regularly pointed out that almost all my pistol misses were with the Bisley. Since I'm working with fairly limited funds, I opted to buy a second Blackhawk instead.
Lady Law is now using my sheriff's rig when she has to carry for work (she's a retired lawdog and has a CCW permit).
Now it remains for me to get the two Blackhawks to shoot more or less alike, and as time and money permit, I'll dress them up a bit--perhaps new grip frames, and certainly I'll replace those painted-aluminum ejector housings with blued ones.