Hi David,
I'm curious about your comment "B" that you "tweak in Audacity." Would you mind giving a little more explanation?
Thanks.
Many of us use a similar process....
I write in BB and get the song itself how I want... key, tempo, structure, etc...
I move it to Real Band where I render my tracks as audio waves.
I import them all to Sonar where I mix, and add my live tracks. All my mixing, polishing, and "tweeking" is done in Sonar.
I export the finished Wave and use Wavepad, an audio editor/converter to trim to length as well as set the final wave level and then convert my MP3's from it.