Nah, I don't have any DRM'd AAC files. Both the programs that you mentioned I've tried, and they're both out of development. They support MP3 fine, and I'd probably be happy enough using Audion if I had decided to stick with MP3. But AAC is a no-go.
As for iTunes, I like it a lot and I use it daily, but I just want a lightweight app that I can just dump files into quickly without having to go back and delete files from my library when I'm finished. And I want basic playlist support, so Quicktime is out. I have VLC, and I have used MPlayer in the past, but neither of them are really great solutions.