I am talking about comments of about 3 people who EXTREMELY praised LCD-X as a revolutionary approach and a definite game-changer etc. etc.... Not really sure if you were one of those or not. :-)
EDIT: I remember some people saying those LCD-X having one of the best soundstage ever, offering incredible detail, extremely flat frequency response and remarkable imaging beating even HD800... Like I said, I was expecting top 5 headphone ever, rivaling the very best (SR-009, Abyss etc.)
LCD-X has something that can be interpreted by some in big soundstage or opened sound. However, I feel like LCD3 has a better soundstage as it has much better layering, instrument separation and scene depth.
LCD-X , however has more forward treble ( I like this as it is not bright ) and this adds more clarity and air on top, so when you put LCD-X after LCD-3 your first impressions would be the sound opened up.