I'll probably pick up "The Small Black Room" eventually, as I intend to do with all Powell films (with or without Pressburger). I currently only have "Peeping Tom."
I might check out "Brand Upon the Brain" as well. I really liked "The Saddest Music in the World," but that's the only other Maddin film I've seen.
But I'm still waiting on "The Hit" and "Insignificance," which were both promised release this year. : ?