Tim, the National Scot would look great with your modern McKenzie. You'd be hard pressed to find a better match. An alternative is diced hose, which cost about the same.

If you know any highland dancers, start asking around for future reference. You may eventually find a custom hose knitter, since the advanced dancers are required to have tartan hose. The tartan hose don't actually match your kilt's thread count, but have matching colors in Argyle patterns that are similar to the tartan.

Here are two of the sharpest examples I've seen (the Arctic and Antarctic tartans). Post from Barb T.