I agree with the extra ground. He obviously doesn't own a refrigerator or air conditioner...get another electrician. Generally I can't hear the difference but with a dedicated grounded circuit I don't have any ground loop, hum or whine issues.
Get a whole house surge protector too. He will tell you that you are wasting $400. You still need a conditioner or surge to protect from minor surges but that big surge can really save you from lightning or transformers on the pole blowing.
Get a whole house surge protector too. He will tell you that you are wasting $400. You still need a conditioner or surge to protect from minor surges but that big surge can really save you from lightning or transformers on the pole blowing.