I think the chap in the photo looks fine (I may change the sporran though), though I am not entitrely fond of those sort of neckties - they look unkept and ultra-modern (uber fashionable) to me for Highland day attire. I tend to think the high contrast between the tartan in his kilt and the tweed in his jacket and waistcoat is rather appealing - of course, this is only my opinion.