Someone mentioned the Serinity Editor. I checked it out this week, using it on a new story. The software is obnoxiously ugly, and a bit odd in how it expects you to use it, but once you wrap your head around it, it rocks. This is part of my workflow from now on. =)
Once the trial period ends, I'll be buying it. $55 isn't bad at all, not for a tool you expect to use a lot.
Here's the Serenity Editor Web page:
http://www.serenity-software.com
-David
PS I'm not associated with the software in any way. If I were, I'd insist on it looking a *lot* better.