Intel NUCs are available as Kits(Barebones), Boards(Mainbaord only) and as perconfigured Mini-PCs.
Ranked in these QuestionsQuestion Ranking
Pro Low TDPs
The Atom based Celeron and Pentium NUCs have a very low TDP of 10 or 15W.
Pro Intel based GPU
Almost any OS has support for the intel i9xx based GPUs.
Plenty of Operating Systems to choose.
6th gen+ models have CEC support.
Con Intel is a bitch
For an M2-port, HDR, better GPU power or more RAM support Intel wants you to buy the much higher priced iX-based models even if HDR would be possible on Atom GPU's.