What after Beyerdynamic DT880 600Ohm on OTL amp?

Hello.
I have many headphones already (visible in my signature) but noone have mids so good like DT880 600Ohm on my OTL amp. I am wondering, what can be an upgrade to them? What is mostly lacking to me on dt880 is subbas, they have really small amout of bass extestion to the low. My Quad Era-1, Aeon 2C have this region greatly managed, but their mids are not so musicial unfortunately. I have few more amps but on SS amp DT880 are unlistenable for me, too thin sounding, too much highs, yet on OTL they really can shine.
Mainly I am asking what is a better version of DT880 for an OTL amp. I have never heard any ZMF headphones and by reviews, pointing to them, but I dont know, I hope experienced users from this forum have it already managed.

Kind regards,
Pablo.

 

Maybe T1 gen1?
I thought it had some beautiful mids with sppoly good imaging, probably best vocals I've heard, so painfully bright though I had to sell them... but based on what you are saying maybe OTL amp is the key, and it's gonna have some of DT880 house sound so good chance they will suit you.