While many people have decent headphones costing under $200 usually, I suppose that a $1,000 set of headphones would beat most stereo setups. The human ear hears from 2 ears so headphones can meet up to the challenge of audio.
Headphones usually are directional to confuse the brain when it comes to space. However, recent algorithims such as cmss3d for headphones developed in conjuction with University of California researches along with the Creative advance technology center have eliminated a lot of problems with headphones.
I am not sold on headphones because I dont like wearing things on my head all the time but in terms of getting audiophile benefits they can beat a lot of sound systems which are affected by ROOM acousitcs, PLacement
and other factors.
Its worth checking out, especially if you have an x-fi in your computer LoL. You can easily tell the difference between a compressed mp3 downloaded and one that doesn't have as much compression right away to a untrained ear. Maybe then your wife or whoever else may prefer high-end audio equipment because things start to sound better, that is already happening - well sort of.