Metrum Onyx versus Metrum Pavane

From the website, it looks as though Metrum has closed shop. I do not at all regret owning the Pavane L3 however - transient precision, body, raw drive (I feel like I gained another octave), and resolution readily exceed the following DACs in my system: Sonnet Morpheus, Lampizator Atlantic TRP, PS Audio Directsream, Chord Qutest. Impressed is not the right word. It makes my T+A turntable jealous, and I am speechless. 

Had an Onyx, have a Morpheus currently sitting in customs. 

What made you like the L3 more than Morpheus? I also had a PS Audio DirectStream Jr and really enjoyed it, but the preamp section was just horrible and very flat when compared to a proper preamp. Have heard Metrum/Sonnets preamp to be much better.

Regarding Gungnir vs Onyx. 
I used to own an Gungnir Multibit and now I own an Onyx. 
My opinion is that if I had to use the Gungnir I would not bother with being an audiophile. I would sell my HD800 and just quit the hobby. That's how night and day the differences are with that particular headphone. 
As far as I'm concerned, it may be twice the price but it's worth every penny and more. The improvements are priceless. 
Of course this is just my subjective opinion with one particular headphone. 

I did try the Pavane before I bought the Onyx so I knew it would be good because the Pavane was amazing. I never got the chance to test the Onyx against a Pavane L1 so I have no way to gauge the differences. My instinct is that the Pavane is slightly better even though I used Pavane solely with USB (via an ifi micro usb3) and I'm using the Onyx with an OCC Silver AES cable.