Right now I use Fostex TH-X00 Ebony but planning to sell it plus all my other headphones to upgrade to Meze Empyrean. The Fostex gives me earache after an hour or so wearing it. Bought different pads but the sound signature got ruined
Now that I'm home all day I want something more comfortable. I use Meridian Explorer 2 as my DAC for casual listening but I pull out my Chord Mojo once in a while. My IEM is great too but it gets uncomfortable after very long listening.
As much as I'm interested in the D90 / A90, I will likely go with the RME ADI-2 DAC FS. I chatted with a few people and read a lot of users who like it with their Empyrean so that's a safe route for me. On a side note... someone I messaged on ebay who is selling their ADI-2 told me they are keeping the Topping D70 because they don't notice audio difference between the two. They are using LCD-X and LCD-2. Shopping for equipment is too hard because a lot of it is subjective!
Enjoy your brand new dac+amp! I'll be keeping an eye out for updates.