I read a very good review for the Microseven microphone, but it's a pretty dated review. I also read a good review for the Hikvision DS-2FP2020. Are there any other ones to consider? How does the Microseven compare against the Hikvision? I had the impression that the Hikvision is more omnidirectional than the Microseven based on they way they look, but maybe that's not true? Maybe inside the Hikvision's multi-hole plastic housing it's just a single hole like the Microseven?