Help me please to decide on upgrade

Hi all
I’m still looking to upgrade my intel dn2820 with something newer . I’ve read the sticky but still can’t decide. My needs/set up is-

Looking for 4K compatible (not fussed re HDR as don’t have any material)
Full surround sound
Ideally something just for kodi

Current set up is through a non 4K receiver to a 4K HDR oled tv.

If new box has optical out I could wire that to receiver then hdmi to tv for 4K but understand it would be capable of Dolby hd etc – that would be temporary until funds allow to upgrade receiver .
A large internal hard drive would be great for my local content but I could get a portable hdd.

Was looking at apollo lake nuc but that appears buggy still ? Vero possibly ? Shield ?
Any advice from you ladies and gents with more knowledge greatly appreciated.
Jamie