I love Cantal cheese, and it is perfect on burgers. Here is the description from my French Cheese Guide:
A very tasty uncooked pressed cheese from the Auvergne mountains, Cantal is a cheese that many consider to be quite close to an English farmhouse Cheddar or Chester. A lot of this “appellation contrôlée” cheese is made on farms, but obviously local dairies in the region also produce it in large quantities.
Cantal comes in two varieties: “jeune” (young) and “entre deux” (between two), meaning cheese that has matured for longer. This cheese’s strength and taste increase with aging, and generally speaking, Cantal cheese is stronger than Cheddar.
Two smaller areas within or bordering the Cantal department produce specific appellations of their own, Salers and Laguiole. These cheeses, made from the milk of cows grazing at high altitude, tend to be more expensive than generic Cantal, and are generally aged longer.