My main concern would be noise reduction, but I was thinking broadly. I wanted to know if there was possibly a suite of products out there that had some interesting effects, better results or presented a better UI.
Plenty out there, some links below but it sounds like you'd be better off upgrading from Audacity to a more capable audio editor / DAW. What exactly do you do in Audacity, e.g. sound design, editing vocals, voiceovers, podcasts, music editing?