Tough list. Wouldn't be at all surprised to see Anathem win it. It was an awesome book. Although there was a lot there to digest, so I guess I wouldn't be surprised to see it not win too. The only other book I've read in the list is Kenyon's.
I, of course, have only read Kay's. Though I'd like to read ANATHEM.
You really should carve out some time to read Anathem Lou - call it a present to yourself - I think you'd really like it.