As an alternative, Lie-Nielsen offers the Mag-Blok an alternative with an all-wood facade. With options in sugar maple and cherry, it's made to fit your butcher blocks, and many models of cabinetry. And at $35.00 for an 18" model, the price is plenty reasonable.
The on-the-wall magnetic knife block is a safe and efficient way to keep your blades sharp and on hand. But metal surfaces can scratch your tools and look a bit industrial, if that doesn't suit your style.