I only trust Camera Obscura, Subkultur and FilmArt labels.
Leaving out bigger players like Koch et al., you could also add Anolis and Motion Picture to this list IMHO. And CMV, even though they are usually not a top tier label quality-wise and in terms of extras, are at least rather inexpensive. With most other genre labels, like '84 Entertainment, XT, Illusions ULTD, X-Rated etc., it is indeed the minefield that broonage was talking about. I wonder how the upcoming Austrian label Cinestrange Extreme, whose boss also used to post here on LLL, will fare against its competitors.