I don't know if the Mac version is good, but I've tried almost everything out there for Windows and all the programs for writers, including Scrivener, and I always come back to good old Kompozer.

make a perfectly serviceable BB since they're so short compared to what we used to have to do in SGA (I am fairly confident that I can crank out 10,000 words with my eyes shut

Yeah, I'm not too worried over making 10,000 words, but that it will never be enough to tell the story.