I replaced the stock cable on my He 1000 v1 with a Norne Silvergarde S Clear cable, and the cable transformed the sound for the better in ways that were not subtle. Later, I have also replaced the v1 pads with the V2 pads, and the sound has changed again : So how does my HeK v1 w/Norne cable + v2 pads now stand in relation to the stock HeK v2, sq wise? I have not the slightest clue, since i have not tried the stock V2 before, but I like the way the v1 sounds now and I am not sweating it. I feel that I can live without experiencing the V2, although if I get the chance to audition one, I would fully embrace the opportunity.
Sometimes, I think components and accessories (DACs/AMPS/Cables) make such substantial differences and transform the sound of cans to such a degree that it almost makes no sense to take another person's evaluation of headphone at face value, unless the headphones and signal chains that are being compared are strictly identical. Even under such circumstances, subjective human hearing and preferences can also introduce their own wild-card variables to muddy the waters....
And then there is the question of diminishing returns, and price-performance ratios and matching etc. etc., which I have lately come to consider to be a "voodoo science" if there ever was one. I have the He-1000, the Edition X, the He-6, the He-500, more recently the He-400i (Ironically, I never ever set out with the intention of acquiring so many Hifiman headphones... In all but the case of the He-500, I got unexpectedly lucky at a certain point, and found the cans selling at a price that was sooo good, and so hard to resist that I couldn't turn away, and I pulled the trigger... And that is how come I own so many of them)... Look I am not complaining... I have found something to like about all these cans, and I have the option to sell any one of them at any time, if I start feeling that they're superfluous, or have become too boring but I digress.
What I wanted to say is that I have never found the differences between any pairing of these cans to match, the differences in price-points, not even in comparing the most expensive among them (the He 1000) with the least expensive (the He-400i)... There differences are there, but they are typically in "small variables" as TheGaddafiDuck has just metioned, and if you were to ask me to put a price on any of those variables or deltas, none, in my opinion should be worth $1000 (hell none would be worth even $500, if we are considering the SQ alone without going into issues of build-quality, ergonomics, and cosmetics).... I have come to find the relationship of prices to the cans to be entirely arbitrary, and I confess that Hifiman has also contributed to the feeling by all the prices they've slashed in the past couple of years...What was the more appropriate pricing for the He-1000? The original $3K or the more recent $2k +? The Edition X ($1799 or $1299)? And the He-560? ($899 or 499)? What are the rationales for the changes? Are they appropriately valued now even at the ire present lower price points? Who can answer such questions in any satisfactory way?
At any rate, such lines of thinking have made me somewhat cynical about getting any new cans.... I have been curious about the Susvara, the focal Utopia, the Audeze LCD-4 and others, but I have not been able to audition any of them. The funny thing is that I do not particularly care any more, because I have become convinced, without even trying them that the differences between the sound of those cans the sound of those I already have would not be great enough to warrant the price differences, and that has made my lack of access to those new cans much much more tolerable... I shall eventually get to audition them if or when I run into any of them somewhere. In the meantime I really don't feel like I am missing a whole lot, by not hearing these new cans, although of course I might be wrong, and that is okay too. This state of mind has been created by my experiences with all the various cans I have tried or owned so far in the past several years, and on the strength of that experience, I do not think I am too widely off the mark in the suppositions I have just outlined. As in all things Audio, your mileage may, of course, vary.