I wouldnt say its better built than my 560. Same headband system which is functional but not great looking and I prefer the wood on the 560. Considering a nice pair of 560s goes for 550-600 here on the forum can you easily say its 3x better in every aspect to warrant paying 3x what you would for a 560?
I would say based on the earcups...that work is very nice indeed. Now the 3X thing is mostly based on the sound for me. I really like the 560s and wholeheartedly recommend them for anyone looking for a great pair in that price range. But simply put the Edition X are my favourite semi-portable pair of headphones I've come across. I thought that kind of incredible sound was only attained with a full desktop rig ahead of it for a full sized pair of headphones.