Personally I see no reason to stick with any one brand just because you own a knife made by them. Often I'll love one company's gyuto but prefer another suji, for example.
__________________ "Excellence is an art won by training and habituation. We do not act rightly because we have virtue or excellence, but we rather have those because we have acted rightly. We are what we repeatedly do. Excellence, then, is not an act but a habit." - Aristotle |