I have had, and seen dogs belonging to others that are whiners, especially when hunting. Some have had spectacular performance pedigrees. Others have not. Some got over the noise after a little maturity, experience and correction. Some did not. If anyone guarantees you will do better with one line or another, then they don't know any better. It's mostly about managing the dog you have. Most dogs can be managed. Some can't. Some people can manage them. Most can't.