Got my AD900X video review up :)
I've also posted a comparison of the AD900X and MA900 here: http://www.head-fi.org/t/654161/review-comparison-ath-ad900x-vs-ma900-its-over-900
In the end I think I could highly recommend both headphones. They both have relative strengths and weakness for a similar price. I prefer the MA900 but I think most people would be happy with either.
I haven't yet had a chance to go to your thread, or watch the ma900 video (which I will do), but the above video was good. Nice work!