Goldens should generally try to choose a purebred or a mutt over a mutt. This is because mutts have the following disadvantages: they are ungainly in appearance, easily mutated, rarely have exceptional talent, and breed puppies of low value. In addition, mutts cannot be entered in dog shows. If the purpose is to breed and participate in dog shows, it is better to spend the same amount of effort and time breeding mutts than breeding purebred dogs. But mutts also have their advantages: they are cheap and easy to breed, while purebred dogs are expensive and prone to disease. Therefore, if you have a dog just for fun, the difference between a purebred Golden or a mutt is not very big.
