The best cinephile setup I've found is Roku + Plex + torrents. Just make sure to have a wired connection to your Plex server and to set up the Plex app on your Roku to 'Direct Stream' the video (so there's no reencoding).
I prefer Roku over Chromecast because Roku has a remote with a headphone jack. If Chromecast had an option to play the audio through the headphone jack of the device you're casting from, I would say it's just as good. In fact, I often cast from the YouTube app on my phone to my Roku, because it's easier than searching for a video using the Roku interface.
