The truth is that I have a fondness for doublets over all other types of kilt jackets. However, they seem to be (with the exception of the more eccentric kilties) reserved for the dressiest of occasions. My questions to the rabble are; are doublets considered acceptable for black tie and slightly less formal occasions? If so, how would one go about dressing them down?

I would think that the type of neckwear would be the best place to start dressing them down. I use a jabot for the one very formal dinner I attend each year, but would that be considered appropriate for a black tie occasion?