Yea most defiantly going with an Orthodynamic, like the HE-500 [and maybe HE-400] And the Azudes [the frequancy response on them is amazing... just looking at it is like OMG]
And I've heard good things about the Denon 7k, in fact there's a fellow roaming around here who enjoys his D7k's and Xb1000 [the Xb1000's being the travelers pair] so that gives me some confidance in them, still though Pro 900 seems WAY to... Fickle... you don't hear of people having any issues with Xb700s other than the obvious lack of mids... they are pretty much what you expect to get, where as the Pro 900 seems to have some suprises you'll LOVE or hate... I'd rather go Xb1000 [which is $60 cheaper] and have my expectations met without TO many suprises, in fact the reviews for the XB700 where pretty consistent and accurate! So you know :3
And of course i've yet to see how the DT 880's will do with Mid Bass Music like DnB and other mid Bass EDM, also on that note the XB's have wonderful Dub Step presentation
[obviously] and that's WITH my crappy Mid Bass E6... when I hit them with a Sub Focused cMoy... I'm afraid I might over drive them <3
So yea... I might get the HE-500 by next year or so!