Received my Magni 3 today, but my impressions are not so good as yours. Currently i have setup pc->wyrd->modi 2->magni2uber->DT 770 pro 80 and HD600, im sad to say but sound of magni 3 i can describe as downgrade compared to magni2U, yes magni 3 a little bit more transparent and a little different soundstage, but magni2u have more evolving and fuller sound, bass is more defined with 2U, treble sounds more natural, vocals are more livlier . Magni3 as for me have sterile sounding, some kind of synthetic maybe, not interesting to listen - at all. Maybe modi 2 dac is not so good for this amp, i don't know. Actually i didn't understand all that hype around that amplifier... volume knob feels much cheaper compared to magni2uber, its not about visual, it's about feeling when regulating it, i didn't expected so cheap feelings about that. I'm not disappointed, i think that 50$ less - is quite reasonable for this unit.
p.s. i decided to stay with Magni2U at this moment, and sell magni 3 in my country. Don't know in which side to think for the system upgrade...
Little update: currently i listen to my xonar stx with dt 770 at home after work, and i found that sound of magni 3 brings schiit stack closer to xonar stx sound, but from that point of view and sound reproduction STX is better, but i don't prefer this sound, i find stx sounding... don't know how to describe this, too digital and harsh maybe... For gaming and cinema STX is ok, but not for music listening.