I don't see a water-bath canner in your list. On average, I will put up around 400 quarts of food each year, this doesn't include jams, jellies, and pickles. The vast majority of my canning, 75% or more is done in a water-bath canner. So that would go to the top of my list. Wal-Mart sells a great granny ware water-bath canner complete with internal rack for about $40. Wal-Mart also sells the Ball Blue canning book for $7. As a self-taught canner, this book was my road map to success! The next book I would purchase would be, "Growing and Preserving Your Own Food" by Jackie Clay. Jackie is the goddess of canning and start to finish, there is no better book out there for my money. I buy a dozen of these books every year and give them away as gifts. Another couple items missing from your list are lids and rings. I started using the Tattler reusable lids last year and although they took a bit to get used to...I love that they can be reused forever!! Happy canning my friend! There is no greater satisfaction than looking at your pantry shelves, full of home-grown food that YOU preserved with your own two hands.
Blessings,
Shenandoah