Metrum Onyx versus Metrum Pavane

Hi guys! I am interested in the Metrum dacs, but I have a few concerns. Can you detail a bit how the two (Onyx and Pavane) stack up to each other as well as in absolute terms with respect to:

a) the soundstage width (I’ve read that Onyx is quite narrow, I can’t stand anything narrow) and

b) HF extension (I don’t need / like a piercing treble, but I can’t stand a rolled off one, I need to hear all the beautiful HF resonance of a lightly hit triangle decaying naturally, for example, instead of cut short or borrowed in the mix)?
Please if possible mention the inputs and outputs used in your comparison. I’d probably use a CD transport via electrical SPDIF and both the unbalanced and balanced outputs.
Oh, by the way, can something like Ambre be also used for playing music from the computer’s HDD? Sorry if this is a dumb question...

Thanks!

...Anybody?!

Why, you disagree with this assertion?The impressions I've read are quite contradictory in this regard - hence my specific questions above. Please, feel free to contradict this statement.

To put things in perspective, when I had the Gungnir Multibit in my system for a few weeks I Ioved many of its sound traits but wanted a wider stage, much blacker background, better treble extension (the stuff above ~10kHz, probably), a more relaxed, effortless presentation (difficult to put it into words, it was a bit as if I was kept in a bit of a tension all the time, perhaps something similar to how I felt about my ex AKG K1000 / D class amplifier as opposed to the effortlessness my Stax) and maybe just a little thicker tone (but this latest thing might have been more a matter of synergy). All heard in a couple of solid state systems + my Stax headphones. It was the (supposedly) latest, unofficial "A2" version (November 2017), kept on all the time and with more than 200 hours of burn in.

Thanks for your answer and your offer to provide me with further information!
Regarding the soundstage, I have found that various sources (CD players, Dacs) can have a significant impact upon its width. My hearing is probably not trained enough to hear depth or height very well (I’m an avid headphone listener) and my speakers system + room is not very helpful, but I hear the width clearly. I have heard these soundstage width differences easily in speakers as well as in headphohes. So, compared to any other sources you have heard, is Onyx’ soundstage broader or narrower? I don’t have a specific track to test soundstage width, for me it’s pretty apparent on any material. If you need something very specific, maybe, from the top of my head: track 1 "Yulunga: Spirit Dance" from Dead Can Dance - "Into the Labyrinth" (after min. 2:53 or so). For example, the hard panning of the left side maracas at min. 2:53 and the rest of the track following this. This is, by the way, a track I’m using to check for reasonable bass extension (tympani at 2:29 and a few times later - not extremely deep but it’s about my threshold for "reasonably extended") and tactility / snappiness / punchiness (from min. 3:02 on).

As for the highs, I often use the beginning of track 7 "Desolate Mountains II" of Jan Garbareck’s album "Visible World". I pay attention to the actual treble extension as well as to the chromatic contrast between the various percussion "notes" - the Gungnir Multibit tended decrease a bit the highest frequencies, accentuate the mid-treble (8-10 kHz? - I don’t know the exact frequency band) and attenuate a bit the aforementioned chromatic contrast (making everything a bit more uniformly grey and metallic). Small things, but I could hear them clearly and it did bother me. How do you find the Onyx compared to my description of the Gungnir?