Hey sorry I havent replied you. Yea my experience with hdv 820 was actually better then with the hd800s. The hdv820 is very neet dac amp combo and the way it sounds and paires with other hp and iems is quiet very good. The warmth and little extra bass it adds always good no need for bass boost. And it taimea the highs slightly so the hd800s would be less peaky.
Though after 600hours on my hd800s and with a wireworld nano eclipse all copper even the 4.4mm connector is copper!!d!
It is still tp treble elevated for my taste its just to much over time it gets accumulated and tiring. Though its still an amazing hp I believe its more oriented for treble lovers.
On my other options I decided to go and try the empire ears Phantom. It should arrive this week and I think to pair it with my hdv820. It should be way more natural and harmonically balanced as sound its some what natural thicker and warmer then hd800s. It is an iem so quiet a different experience but believe or not its more expensive than the hd800s lol. 1800 USD
Will see what happends