Updated the graph on the first page, since I now got the MylarOne XBs... and boy, are they nice for the price. They're no Atrios, but they surpass the Vibes in many aspects, IMO.
The X3's dropped down in the ranking, since mine seemed to lose all the bass they had. Weird as it sounds, but it seems they "burned out" instead of "burned in". They're certainly still nice phones for some people, but I can't live without a proper amount of bass in my tunes... for people who like the Etymotic ER-6 sound, those are the best alternative, for a much more reasonable price - and the X3's are less cold and sterile sounding, too.