We have several users using software like Kodi or Plex for example.
I will recommend you the 7th Generation Intel® NUC Kit or Intel® NUC Mini PC.
Please check the following links.
Intel® NUC Kit
Please check the link below to find the differences between the Intel® NUC Kit and the Intel® NUC Mini PC
i bought a Nuc7I7 and one the biggest regrets of last year
if you want the basics then windows is fine with a nuc7 but HDR is just a mess and no software seems to be able to get it right yet with windows, i bought a £99 AMlogic box and to my surprise it does the basic of play 4k HDR movies with HD audio, all my blu-ray and all my TV shows, doesn't have the grunt to run my preferred skin in kodi but end of day it does the job of playing media
the nuc also has issue with certain high quality music files and doesn't outout at 192bits downscales to 148 or something, like said big mistake and wish i could get a refund
the main issue is windows and all applications cannot do HDR 4k movie playback correctly powerdvd you get HDR, HD audio but for some unknown reason they don't change the refresh rate to 24p they leave it at 60 so i get massive headaches from the micro stutters that produces
Kodi is slowly moving along but still lacks HDR passthrough and i think only the dev will know which way it will be supported and implemented, MADVR i cannot get HDR to work even though is detects i have Intel HDR
if you worked so hard with cyberlink (which in it self is a pretty poor company for support) to get 4k playback working why not dedicate some people to assist Kodi developers, how about getting some better Linux support and getting HDR working there with NUC7's and above
needless to say i am not using the box anymore as a £100 solution so far does everything 24p 4k HDR playback with passthrough audio, it's amazing a small company out does a major player like intel, i'd say get it right or just abandon and stick to making chips as i will never recommend Intel to anyone after this