Gary: I thought you were a big fan of the Crown. I had recently considered the E6 and the Crown that you liked. I was able to find the E6 wired at a company in California who's name I can't now find. I did not buy it yet. I asked them about omni vs. uni direction. The salesman was that they sell a lot of the E6 mic and he was quite adament that the unidirectional are very problematic and they don't like selling them.
You have to be very careful with the placement of the E6 uni.
http://www.northernsound.net/Sales/mics/countryman/e6instruct/e6instructions.html There is a discussion of it at:
http://www.churchmedia.net/CMN/audio/21246-countryman-e6-omni-or-unidirectional.html