BIG question:

Is this for a PERSONAL kilt or a "band kilt?"

If personal: up to you and YOUR tone preference.

IF band: Are the band members all clergy/nuns/monks/etc.?
If so-> CLERGY! THAT would be a VERY cool "selling point" for the band, a "unique element."
If not-> I would say Black Stewart, for the simple reason that the clergy has the "church clergy ties."