One thing I would do, is get a large stock pot. I make my own stocks, as well as large quantities of soups, and we use the stock pot to cook pasta for spaghetti, stroganoff, corn on the cob, etc.
If you aren't going to be making large quantities of soup, get a 16 qt, thin, enamelled stock pot. They're dirt cheap. Because they're so thin, I wouldn't recommend sauteing anything in it. I have two, a 16 qt and a 22 qt (the big one is SS), and I only use them to boil/simmer liquids.
If you do decide to make some soups, you want a heavy-bottomed pan, either a cast iron dutch oven, or a nice tri-ply Caphalon / All-Clad soup pot, about 4 qt.