Cheap alternative is buy a android tv box with amlogic processor(s905x3) costing around 3000-5000.Install coreelec (standalone kodi) in a SD card and boot...Any other good alternatives ( probably cheaper ) , I dont need 4K capabilities , just ATMOS audio for Full HD !
I do have it and it plays all files flawlessly.
Assuming 1600h will ouput atmos using ur existing speakers by height virtualisation.