Tara, you should stay away from the porcelain steel or enameled steel. The cast iron with porcelain is an alternative to look at as well. The greatest setback with any of the products with a enameled /porcelain coating is chipping of the surface thus causing the forces of rust as well as cosmetic unsightliness. Also look at products like "molded stone" (different manfacturer call it by other names) Cheaper S/S sinks will loose the luster faster,,BUT always follow the recomended procedure for cleaning/care
NO cleaners such as ajax or comett that contain abrasive properties.