I have a cousin who has a $100 discount on any knife at zwillingonline.com . The only Henckels knives I have are the Twin Cermax that have been discontinued, and I've been very happy with them. Zwilling has so many different lines, and I can't tell from the site what the blade quality is. There's Pro Sm, Four Star 2, and Twin Profection that seem to be in his price range. Can anybody tell me what the difference in blade quality is?