I've been told this B-grade SF movie has a lot of Warhammer 40K inspiration, specifically Tau. Apparently, there's even a "for the greater good" quote in it somewhere.
[url]http://www.imdb.com/title/tt1270291/[/url]
Trailer:
[url]http://www.youtube.com/watch?v=o7iWTRrJ3cE[/url]