Intel NUC PQ = A++ Just start with this thread to find out why there's excitement about it!
+ Don't know why it is, Intel PQ = jaw-droppingly wow! Others agree (@movie78, @wesk05, @Skank, et al)
+ Integrated Kodi solution, with excellent support by @afedchin
+ Automatic flipeyes for right-eye-first 3D titles (like 'Drive Angry' 3D, all 'Hobbit' 3D's)
+ As it's Windows 8/10, you get premium apps like Netflix & Amazon VOD in full HD
> Not quite that set-top box feel compared to OpenELEC or that media player feel like with HiMedia; but, Launcher4Kodi app helps
- DD+ doesn't bitstream for now, an overall Kodi 17 issue
- Not yet ideal for 4K, especially via HDMI, with 10-bit and HDR; need to wait for Intel Kaby Lake, beyond
- May not be cost-effective for Europe as @looun reminded me, where HTPC solutions are pricier than U.S. and Asia
RPi3 PQ = A
+ Integrated Kodi solution, with excellent support by @popcornmix, @Milhouse and others
+ Excellent, natural PQ
> No HD audio bitstreaming, but for 80% of users, probably not a shortcoming as multichannel LPCM works well. However, matrixed metadata and ATMOS/DTS:X are lost!
- No apps like Netflix, Amazon, but 720p experiences of those possible via PlayOn external server app solution (far from ideal)
HiMedia Q10 Pro PQ = A-
+ Once remaining key issues noted are fixed so they don't hinder PQ, content enjoyment, PQ grade will be solid A
+ Excellent handling of all types of 4K (8-bit, 10-bit, AVC, HEVC, HDR)
- External player solution, with Kodi simply a front-end
- Few bugs/issues remain (as noted above)
- No HD versions of Netflix, Amazon or other premium apps