While you're shopping, pick up a wooden pestle as well -- those granite ones get really heavy when you're stirring in oil a drop at a time for aioli.
Instant-read thermometer
The two things to look for are a capacity of at least 10 pounds and a "tare" feature that helps those of us who are not mathematically inclined to allow for the weight of bowls
Heavy-duty roasting pan
Expensive red wine vinegar
Bargain cast-iron Dutch ovens from the hardware store may not be as pretty, but at a fraction of the price, they'll work almost as well