I do a lot of research for a new Kodi/LibreELEC box, but I haven't found one that matches my requirements.
Maybe you guys have a recommendation for me.
Among many other pages I have of course also read these.
I really think you are asking a bit too much from the community. What you really need to do, is research the multitude of SBC and find one that meets your specs and then ask if LE supports that model.
You also forgot price/power constraints. If unlimited, then I am sure there is something out there.
I have the 65" version of the same LG panel and a similar AVR and a legion of test boxes/devices to experiment with. The short answer to the question is "the box you are seeking does not exist" .. and on that basis I'd go pick up a cheap S905D box with GB ethernet (avoid the S905D devices with 100-BaseT PHYs). It'll be fairly cheap so when you chuck it out in 24 months time to get a newer (still not meeting that spec, but more advanced in some way) device you're not left writhing in angst about how much it cost you.
From what I have read so far, the Vero 4K+ comes closest to my requirements. There are only minor problems with HDR.
Just a question. Are devices like Intel Nuc completely out of the picture?
It depends on your 'use case'. Right now, AFAIK, hdr in Linux is still a work-in-progress (if at all). Other than that, it should be able to do 99% of all videos. A NUC tends to be a somewhat more powerful solution for heavy skins, also gigabit speeds and disk read/write speeds tend to be better. NUC components are still pretty expensive, for example DDR3/4 dimm prices.
On the other hand, the average cheap China box you can get now for the fraction of a NUC price, but they do underperform in certain areas. Video-wise, the price/quality factor is pretty good.
Ye I totally get the price:performance! Haven't tried any android boxes yet. Only Odroid C2 and Raspberry Pi.
From what I have read so far, a well supported S905X box is (much) better than a own build x86 solution (eg. NUC).
Personally, I have now ordered a Vero 4K+.
currently the only downside that you have no HDR support, S905 has some hacky (it is no real 10bit HDR) support for it.
Pricewise you can't beat S905 ofc.
What is The Box these days?