I'l just chime in to say that I also think regimental/club ties look great with the kilt, and for those who like the look but are not entitled to wear a particular design, it is possible to find ties in this style that are not affiliated with a particular regiment, school, etc.

For example, I found this tie in a menswear store while on vacation eariler this year, and the colors go splendidty with my kilt.