I just finished Between Floors and have sent it to a test reader and an editor I found through Romance Divas who also has an editing/critiquing service. I've heard good things about this editor, so I decided to try her critiquing service. I've heard from several people that it's good to have critique partners or critique groups, but my schedule is so hectic that I don't feel I could do someone else's work justice. However, like every writer, I can use an editor. So I'm looking forward to seeing how this works.
I can't tell you how glad I am to have finished Between Floors. I've lost objectivity on this story and learned a very important lesson--there's a reason I usually go back and forth between stories. When I don't, I get way too bogged down in the one story. Alternating works much better for me; when I get tired of one, I move on to the next.
This basically solves my question of what to work on next. I'll work on The House Party for a while, then start Tavia's story, and keep going back and forth. This process works much, much better for me.