Jared: Since my last posting, I spoke with my brother and pointed out your OP to him. Both of us regard it as very odd that no posts directly addressed your question. Usually requests for opinions are met with responses of all kinds - good, bad, and indifferent.

My brother basically confirmed what you wrote. Both his son, and a good friend of his, have owned J. Higgins wool kilts for years and are very happy with them.

But, like us he doesn't know anything about the J. Higgins PV line. Their web pages state that the material is imported from the United Kingdom, so it may very well come from Martin Mills.

Hopefully, someone with direct knowledge will share it and/or their opinion with us.

Cheers.
John