3rd-Degree is pulling out some really GREAT stuff, the director of most of theirs movies is Chris Streams, very talented.
I agree about Quasarman being one of the worst directors, his scenes are dull and boring.
Zero Tolerance though also produced some good stuff, but lately i see only movies shooted in europe with euro-girls (mostly cz), and beside few exceptions i dont like euro-girls (expecially the robotics east-europeans, hot but not really involved in the scenes, i rather like the fucked up american white trash drug addicted whores).