Black Islanders are great but don't go beating in them! I am not Keen on the Barbour endurance gaitors as they seem mis-named to me from my experience. If you are beating, keepering, or spend a bit of time pushing through brambles then the best I have found are the Kammo ones. They come in medium or large and are very durable, I chose the large and am very pleased with them. I keep my mended Black Islanders for stalking only.
Simon