Just a few thoughts. Merino is a great felting wool. Other fine wool sheep breeds are great for felting, too.
Angora would not be a good fiber choice for felted soaps. Angora fiber is from Angora rabbits and while it's beautiful and soft, it would not make a good felted soap (and it's really expensive). Mohair comes from Angora goats and is great in the right places, but wouldn't make a good felted soap.
Thanks for letting me add my .02! -- Karyn from Ten Good Sheep