The Denon D7000 was highly-regarded, back in the day. I think its successor model, the D7100 greatly damaged the brand's reputation, with its less-than-ideal sound, and an aesthetic that was aping the Beats headphones that were all the rage at that juncture.Ah yea, I like the D9200 a lot, it sounds highly detailed, organic, dynamic, and the tuning they've done in the subbass is very satisfying. Fun and yet still very much "hi-fi". I highly agree that it deserves to be taken seriously among the "summit" of closed-backs. For me though, they don't differentiate themselves from other closed-backs in terms of how "closed" they sound, which turns out to be pretty important for me. When circumstance permit and I find myself needing an "on the go" headphone again, it'll be on my shortlist again.
The Stellia, by contrast, somehow never reminds me of the fact that they're a "closed-back" while I'm listening to them. Probably due to a combination of factors, all of them positive. Also, they continue to impress with how well they scale when thrown at different (full-size) amps and headphone cables. I probably also just like the Focal sound.
I was a Verite early adopter and as pretty impressed at how badly tuned they sounded to my ears (!). I'll probably need to give them (and/or the VC) another shot.
Anyway, I was pleasantly surprised that, despite its top-notch sound, the D9200 was rather small and light - you're right, it can be a portable solution.
I like the Stellia myself, and if the opportunity permits, I might purchase one, just not anytime in the near future, I suppose. I have spent quite a fair bit in recent months, and my wife is starting to give me the evil eye.