Can confirm, Sonarr+Radarr+NZBget+Usenet+Plex+1gb-internet and I have everything I need at a moments notice. I pay for Netflix and Amazon Prime for convenience and proper subtitles, that's literally the only reason.
The first, is a 'searcher'. Here, that is sonarr (for finding TV series) and radarr (for finding movies). There are some alternatives. Most notably couchpotato for movies. You simply tell these programs what you want to see, and they look through torrents and newsgroups to find that content.
Next, you need a downloader (or 2 if you use both torrents and newsgroups). For this, it is important that your 'searchers' can talk to the downloader, so things happen automatically. Basically anything should work here.
Finally, and optionally, there is a viewer. Plex is the biggest here. It allows you to view your media anywhere with an internet connection, it also tracks your library, and what you've watched. You can set up your searchers to export all downloaded files to plex.
For starters, I'd set up a simple searcher-downloader system, and build up from there.
