For me, if it justifies the expense by me liking it more than something else and being better in everything than something cheaper (that's why it should be more expensive)...that's awesome!
My Stax setup (headphones + amp + DAC) costs like 4 times the Meze Empyrean, and I'm extremely happy with it and think of it as a great investiment because it makes me smile wide open.
Are all the expensive setups worth it? No, there's so much vaporware that I don't know where to start, good things are expensive, but there's a difference between expensive and overpriced.
I think that this headphone is something extremely interesting that I would like to audition, and if it lives up to it's promises, then I would own one, of course.
At this moment, every discussion regarding the Empyrean's price is useless, because we don't know anything serious about it, just show impressions, and they don't even have the final voicing ready.
Let's wait a couple of months and see what happens with this, I personally want it to be awesome because some planar headphone makers need a good kick in the butt, and a really good one.