So the short version, if I've read right, goes like this.

Wool is a minefield. Expensive, much homework is required as to the individual mill involved, samples should be ordered. However, the money spent is reflected in quality.

Second runner up is PV. 11 oz is pretty standard. Good color, holds pleats well and can handle daily wear like a champ. Alot of bang for your buck.

Acrylic is darn near a throwaway demolition kilt. Doesn't hold creases well, very light, very inexpensive.

Does that about sum it up?