I always thought the mass produced mouth calls were hard to get a good sound with. I then hunted with a guy that custom made his own calls and he made me a couple. Man what a difference so I started to use the custom made calls and will not likely ever use a mass produced one again.

To answer the question my favourite are made by Warbird Turkey Calls and second to XT calls. I have used Hooks but didn't really like them but they did put out a good turkey hunting dvd once.