Thanks everyone for the comments on the setup and also your experiences. I was watching Band of Brothers on Blu-ray last night, and I still think the weakest link sonically is my mains. I just don't like their pronounced mids.......I really notice it when listening to 2-channel music.
I might audition some bookshelf speakers, and also see how I like the CM8s. Again, I don't have a huge space and my subwoofer handles bass nicely, so I'm torn between getting bookshelf speakers or small floorstanding speakers.
Do most bookshelf speakers come with a way to secure them to the stands? My stands didn't come with anything to secure them with, and my 685s don't have anything for that either.