I was considering using a lav mic taped to somewhere on the podium for a high school graduation ceremony that I will be videotaping. Is this a bad idea? I was also considering purchasing a new mic (e.g., a cardioid?) for this application, if the lav mic is a bad idea. I will be sending the mic output to my dvx via a Sennheiser 100 setup, if this makes any difference. Any suggestions on a specific mic for this application most appreciated (or, can I use the lav without much problem?). Thanks.