Question about Zappiti Duo 4K HDR Dolby Atmos & DTS:X, 4K media player

Hello everyone. I am looking for a product that can be compared to the WD TV Live. Only better, more modern and and....... :-) Is the Zappitti the right one? And which ones: mini, one, duo? What about other devices like Golden Interstar G-200 etc.? I would like to be able to play my videos and photos from the NAS in the network via the TV without getting annoyed when I read "file cannot be played" in the middle of the film. Thank you for your advice! LG Andy