How big is your collection? I loved my WD live up until I got into the 4TB range of movies/TV shows. Now its terrible to search with. 400 movies in a folder is annoying especially when you cant remember what each one is about.
All honesty WD is better for playing every media type ever. Roku is better if you're running something like Plex already and want the metadata(again because of the size of your server)