I've upgraded to the R50x from my 12-year-old ATH-AD700. Finding a worthy successor was challenging, nothing seemed to have what made me love my AD700. I really liked its wide soundstage and the fact that I could wear it all day without even noticing it on my head.
Now the ATH-R50x is all that, and more. I finally get to enjoy some bass without sacrificing the detailed, airy highs I loved. The soundstage is still wide and airy, and the headphones just "disappear" on my head within seconds of putting them on.
I thought I'd miss the wing supports, but surprisingly, I don’t. The pads on the R50x are unnoticeable, and the headband doesn't put any pressure on the top of my head. I'm very happy with my purchase, it really feels like I've finally found what I wanted.