Hard Anodized Aluminum makes good cookware as it conducts heat evenly, and the hard anodized coating (which looks grey) on the aluminum makes it invulnerable to corrosion. The interior of these pans tends to have a nonstick coating so that a) it is easy to clean and b) your food does not come into contact with alumimum (this means you can cook acidic foods safely in these pans).

There are many manufacturers who make hard anodized cookware sets - the most popular is the Rachael Ray 10 piece hard anodized cookware set.  However the Cuisinart 17 piece cookware set and the KitchenAid 12 piece cookware set also offer value (and more cookware pieces).

When deciding which set to go for, check out what is in the set - for example if you may use saucepans more than any other pan in your cooking, then the Cuisinart or KitchenAid sets might be better for you as they contain three saucepans not two. If you need a large stockpot, then go for the Cuisinart. 

See below for where you can purchase these sets from Shopping.com