For archiving quality I'd take [UTW]'s
Fate Zero s2 over [Horrible] ... if you can do 10bit. Although there seems to be more seeds on
bakabt - a great site for finding complete (non-licensed) seasons.
[Hatsuyuki] is a group that focuses on quality over speed. They would be a good
8bit alternative for archiving if you can't do 10bit. They tend to be too slow for my tastes on a week to week basis, so I haven't followed them much in the last few seasons. There's no handy batch torrent, so you'd have to torrent their individual eps and maybe use
IRC/XDCC instead of torrents on the oldest eps without seeds.
On occasions where I'm only mildly interested in a show out of curiosity and want the tiny 480p file size to conserve bandwidth/HD space I'll go for [Horrible].
