Got these babies back after 6 months now. I was initially still impressed by the sound quality, although I've been using the FX700 since.
Highs are a little metallic, but I still have no problems with sibilance. Bass is lacking some texture and mids could have some more body.
However, I still enjoy these a lot. Regarding build and design, I can probably identify myself best with the Panas. I will probably buy a back up pair when I get the chance.