I'm not being nearly as negative about this as you seem to think I am.
I enjoy headphone listening too. The stereo separation is certainly very good, and (as I said) in terms of actual sound quality (lack of distortion) a headphone amp and 'phones costing costing only a few hundred pounds between them easily outperform a pre-amp/power amp/speaker combination costing thousands. Most people don't realise how good headphones can actually sound a) because they have never listened to a decent pair of 'phones, and b) because so few player/amp/pre-amp manufacturers bother to devote any time and money to the headphone output.
The thinking presumably: why should they if people never use it? If they do then it will put the price up, and other products that don't pay any attention to headphone output will sound just as good with speakers and cost less money, so their product won't sell.
I think it's a real shame that the industry doesn't do more to suppport headphone listening. I'm increasingly perplexed, for example, by the endless progression towards more and more loudspeakers in a system. Where will that end? When it comes down to it,
people only have two ears. If you can exactly reproduce
at the ear what the sound is supposed to be like, then you should be able to reproduce
anything more precisely than you could with
any number of speakers (unless you cover literally every square inch of the walls, ceiling and floor with thousands of them).