I'm not sure any AKG can be considered an evolutionary step up from a Beyer. They're sort of have two different house sounds.
I haven't heard the DT880s in forever, but I imagine the Anniversary will be warmer sounding, with darker treble and thicker mids.
Ultrasones tend to be very polarizing (not too suprising given their radical driver design/placement).
It's a shame that I don't live in an area where I have access to all of the various headphones that I want to try out before buying. I prefer a neutral sound (it's what I've adjusted to over the past three years with headphones as well as IEMs), but it's not like I really need to permanently replace the 880s or anything. I initially came from a (heavily EQd, while I use no EQ on anything now) generic set of Sennheisers that were on the warm side and pretty fantastic for vocals, so I'm not completely adverse to it. What do you mean by darker treble though, slightly muted or muffled sounding? If so, as long as it's not so dark that it affects clarity too much, I'm not sure that would particularly be too much of an issue for me either. I'd rather the highs be neutral or even slightly muted as opposed to being overly bright.
Also, is there any drastic differences between the K702 and the K712 sound wise?
Edited by Sanctuary - 12/11/13 at 5:38pm