Yeah...I gave Fidelia a try. While I like it, and their headphone processor is pretty good like you said. Two issues, though: 1. It won't pick up the Canz3D plugin. Seems it only will use official Apple plugins. 2. I prefer not to add a whole new interface to play music. That's why I like...

Picking up this thread with a question about something I see was mentioned earlier. Didn't read through it all, though (there's a lot here). I've using the newest version of BitPerfect, and loving it. But, an option for AU or VST plugins would be fantastic. I tried using AU Lab and Soundflower...