The best speakers are no speakers at all. The non-existence of speakers, not matter how perfect they might be, is my goal when I listen to music. This is my golden standard
Headphones do add their coloring and this is bad enough. Why aggravate the matter with distorting the sound even further by adding the effects of speakers and room? If there is a technology letting us to get rid of the coloring of headphones (without significant side effects), I will welcome it.
Yeah, this thread is long but it consists mainly of your messages where you relentlessly advertise the Isone Pro. I guess you are affiliated to this company? On the other hand, for most people, being "an useful (unpaid) fool" is already enough motivation to push some ideas or products.
Also, I remember when I offered my own settings (they go at this forum under the name "ironmine settings") for Isone, where I suggested to switch off ALL effects in Isone and use ONLY the crossfeed (with minimum settings too), the people enthusiastically embraced this approach and were shocked at the clarity of the resultant sound.