Just came back and looked at this again. Get the hat and wear it, it will go with the kilt just fine. Subdued colours will allow the kilt to hold the attention, will also prevent you from looking like some exotic bird with your comb spread. A shirt of solid colour which compliments both would set things of to a fine display. The combination of complimentry colours shared between the two should make it look like they are ment to be worn together.
Add in hose matched to a minor colour of the kilt with flash mated to a major colour or even to the shirt and there you are...a picture of sartorial perfection. :smile:

Mike