I've been entrusted with selection of video and audio recording equipment at my work for recording interviews that will take place between two people seated about 5 ft apart in a small office with a noisy overhead HVAC/fan system. I've picked out the camcorder, television (for playback), but due to the noisy air/fan in the ceiling of the rooms, I want to pick out a microphone to make the speech more audible.
Both of the peoples' voices will need to be recorded, and so I'm thinking right now that maybe a desktop style microphone (see pic below for a general idea of what I'm looking for) with an omni pickup patter would be ideal. Oh, and it needs to have a 1/8" output so it can plug into the camcorder. Budget is up to $150-200. Any suggestions would be awesome, thanks!
edit: also preferably a mic that does not require plug-in power. and would a cardioid mic be a terrible idea if trying to record two people with one mic?