There isn't a more useful tool than the kitchen knife, which is why many chefs feel that it's worth splurging on one.But if you want to use the same knife as Ina Garten, reach for a Wüsthof. Here are our favorites:.Wüsthof Classic 8-inch Cook's Knife: $150 at amazon.com.Wüsthof Classic Carving Set: $152 at williams-sonoma.com.Wusthof Classic Ikon 3-1/2-Inch Paring Knife: $70 at amazon.com.Wüsthof Gourmet Burger Knife: Set of 4, $60 at williams-sonoma.com.Wüsthof Gourmet 16-Piece Knife Set: $350 at williams-sonoma.com.Wüsthof Stainless-Steel 8-Piece Steak Knife Box Set: $100 at williams-sonoma.com