I currently ride western, and ride in a billy cook all around. Although I feel it's very heavy for the longer rides.
My F'n'E is an older model, so it's on the heavier side to start with.. when you add in my saddlebags and water bottles and other misc crap, it weighs about 30 lb. Dream carts both it and myself around happily. I am loathe to try a newer (lighter) saddle because we have never had a saddle fit issue in this one.. and I am of the if it ain't broke, don't fix it sort.
So don't let the weight worry be the only factor in deciding on another saddle.