f you want the best example to learn from when learning to speak(phonetics) a language, then it is best to get it from the source (that is if you can).

Many people cannot, and if you have a good non-native speaker I doubt it will make much difference until you are at an advanced level.

Once a person has passed the intermediate stage of language learning they can generally learn best by simply spending time in the country where the language is spoken, a teacher is a luxury and not a necessity.

A good non-native teacher is better than a native speaker who just calls him/herself a teacher in order to work overseas.