When the spouse has her own dedicated space/rig, justifying purchases tends to get a lot easier, in general. My spouse has pretty much taken over the family room, which is a repurposed hybrid hometheater/music room, save for more intrusive room treatment...and I rarely go in there.
I also see non-audiophiles exposed to some high fidelity on a regular basis, i.e. a bunch of these soccer mom types sitting around in there with their wine glasses. John Mayer is hot, apparently...At the least, he is also a gifted musician...but, some of the Diana Krall fans around here celebrating her lack of talent have no excuse.