My company gives several educational virtual seminars per month through GoToWebinar. We have a small room in which we do these virtual seminars and run into issues with audio quality. There are a lot of issues with environmentals that I'm trying to resolve but a large part of the problem is directly related to the poor quality of mics we currently use. We need 2-3 mics/headsets that can be plugged into a computer and used. Ideally, they would be noise canceling to minimize feedback. Our budget is somewhat large for this - these seminars bring in a large amount of revenue and audio quality is of utmost importance. Any tips or suggestions on mic solutions?