I bought the UE900 dented box (box looks fine to me) off of Logitech so I have something I can let others use (after cleaning). I was very frustrated with being able to tell my friends just how good HD audio sounds (on my Fiio X3 & UE Pro 7 Customs) and not have anyway to let them hear at least part of what I hear. The UE900 will afford me the opportunity to indulge my friends who say "Prove it."
At first listen they are a bit more boomy (base heavy) than my 7's, but they are brand new and I suspect there will be some difference between the triple armature 7's and quad armature in the UE900 (damn it why did they have to call the new ones UE900s, how am I supposed to refer to the standard UE900? Just saying UE900 feels weird. /rant off)
I'm going to work them for a while and see how or if they change over time. It would be easy to remember how much I paid for them and deem them "Awesome", but I'll leave that to the sheepeople who buy Beats. :D