If you ask me- I would say a Realtor Extraordinaire would be better. YES- MORE IS BETTER!
Why? Well agents whom usually focus on specific neighborhoods aren't typically seeing the whole picture. They are shortening your odds as a their clients, especially if your the home seller.
Let me break this down for you. If a buyer is planning to buy in one specific neighborhood (EX: Dominion Valley, Piedmont, Lake Manassas) that buyer is going to see your listing no matter what, it doesn't matter whom your Realtor is, they will find it.