Audeze vs. HIFIMan vs. ??

Hello all, I'm in the market for a set of open-back over the ear headphones. My current price range is $800-1200 or so. I have a set of Beyerdynamic DT770 PROs but while comfortable, leave a bit to be desired in sound quality. I think some of their deficiency has to with the fact that they are close-backed. It's not like they're horrible but as with most things audio, there's always better. <g>

I like the idea of planar magnetics vs. traditional drivers. They strike me as being "electrostatic-like" without the added complexity of having to energize stators.

I've been seeing the brands mentioned above and would be interested in hearing people's, preferably current owners, opinion of them.

Thank you in advance. Happy Listening.