A few comments:

1) The quote: "I haven't proposed yet, but she knows it's coming."
According to a poll taken years ago the average bride had chosen her husband about 6 weeks before the average husband had chosen his bride.

2) If you think she should concede to your wishes, then you should concede to hers first. That way there is no hypocrisy.

3) If you are dead set on the kilt, remember - no apparel is worth a lifetime of love of a good woman. ( I have been married almost 35 years - my parents 65 years - its the voice of some experience speaking)

4) COngrats and I hope it all works out.