I don't understand the whole thing about the ma900's angle. Theyre angled in a way so the drivers face your outer ear so it doesn't directly shove the sound into your ear canal. Just in case there's a misinterpretation, the picture has the guy facing away from the screen, implying that the sound is being projected from a point on front of your head, just like speakers.
I'd definitely recommend the ma900. All the good stuff you hear about the q/k70x's soundstage is because it has tons of width. Even my lcd2, a headphone that isn't really known for soundstage, beats my q701 in depth.
That said, the akg k70x definitely doesn't have much depth. It's very obvious when switching to something like the hd800, which has boatloads of depth, enough to make music sound out of head like speakers.
edit: grammer and speeling
Also, people often confuse sound stage depth with width and the other way around for some reason I don't really get..