There comes a point in most podcasters' lives where they want to do more and do it better and faster than what Audacity can offer. When we switched from Audacity to Adobe Audition, it made much of our audio-editing faster, easier, and even gave us better tools to make the audio better!
Compression, loudness-normalization, MP3-encoding, multitrack-recording, and more are all included with Adobe Audition. Plus, their Essential Sound panel makes many complicated enhancements as easy as a few clicks!