Greetings, Jesse, and welcome to the forums!!
The answer to the white spot question all depends on what you're planning to do with your dog. Here is a passage from "The Vizsla" by Bernard C. Boggs:
VIZSLA STANDARD -- "Color: Solid golden rust in different shadings. Solid dark mahogany, red and pale yellow are faulty. White on the forechest, preferably as small as possible, and white on the toes are permissible. Solid white extending above the toes or white anywhere else on the dog except the forechest is a disqualification. When viewing the dog from the front, white markings on the forechest must be confined to an area from the top of the sternum to a point between the elbows when the dog is standing naturally. White extending on the shoulders or neck is a disqualification. White due to aging shall not be faulted. Any noticeable area of black in the coat is a serious fault."
So there you go. I guess the question is, are you planning to enter your dog into any dog shows??
I guess if it were me, I wouldn't worry about it too much. Your decision, of course.
p.s. I'm sorry, but I don't know how common the white spots are.
VIZSLA STANDARD -- "Color: Solid golden rust in different shadings. Solid dark mahogany, red and pale yellow are faulty. White on the forechest, preferably as small as possible, and white on the toes are permissible. Solid white extending above the toes or white anywhere else on the dog except the forechest is a disqualification. When viewing the dog from the front, white markings on the forechest must be confined to an area from the top of the sternum to a point between the elbows when the dog is standing naturally. White extending on the shoulders or neck is a disqualification. White due to aging shall not be faulted. Any noticeable area of black in the coat is a serious fault."
So there you go. I guess the question is, are you planning to enter your dog into any dog shows??
p.s. I'm sorry, but I don't know how common the white spots are.