Poll closed! With 7 votes, Our Mutual Friend wins. I'll start a thread for it tomorrow. I'm already about a third of the way through rereading it, but things will probably go quite slow for the first few days while people start to read.
Thanks for voting everyone. I was pleasantly surprised to see so much interest in Dickens. If the discussion goes well, I'm sure we can start another thread on a different Dickens novel after we finish Our Mutual Friend.
When I start the Our Mutual Friend discussion tomorrow, I'll post a link here to the new thread.