i think a 686 is pretty much the perfect revolver for home defense. And in a scenario such as mentioned above, where emptying 6 chambers isn't enough to deter the attack or invasion, I'm done with handguns altogether and going up the ladder to a pistol grip pump 12 gauge with a huge tube full of staggered double ought and slugs.
The problem is time. Why do you think there will opportunity to transition to a long gun once your revolver runs dry or any other gun in general when multiple intruders are charging down your hallway? The op has children as do I, so having multiple guns lying around that are immediately accessible isn't an option.