any of these 3 major brands you've mentioned are good. I have both models 2016 Sony x80d and 2016 LG UH8500
- check samsung if okay with you if the connections are separate the TV unit (it may cost you a fortune to replace it, ask the dealer how much) and check if it's Tizen OS is easy for you to use
- check LG if the web OS3.1 if you find it user-friendly, easy to navigate and change sources quickly
- as for Sony, you may have an edge if you'd like to go android gaming (using a PS4 gamepad controller), you may install TV games there via Android PlayStore, you could have Kodi/SPMC as your movie/music player
now it's up to you to spend time, visit and make a deal with major appliance stores for best offered prices.
demo them thoroughly.. bring your best picture (image of your photography shoots), movie materials (be it a downloaded file or bluray disc) to see side-by-side the performance of your choice of brand/model... check their remotes if easy navigating through functions, sources, etc.
check out this thread as well...
http://www.pinoydvd.com/index.php/topic,207220.0.html=)