There are too many new podcasters as well as seasoned podcasters who are obsessed over their audio quality. Being obsessed over audio quality has the potential to consume all of your time, time that you could use to produce additional podcasts. For new podcasters specifically I am sure that you have heard from other seasoned podcasters that audio quality is not as important as good content. This is not to say that your audio quality is not going to matter at all but if it is at least acceptable you will be fine.