Quote:
I am so thrilled that you have had success with your new additions.  I also use a special dog to 'watch' everyone on our property, and I tell everyone who has any kind of intruder, whether it be groundhog, deer, coyote, fox or bird of Prey,  GET A GOOD DOG!  You are living proof!
However..... the post I quoted above has me VERY concerned.  As a life long owner of dogs, and at one time a dog trainer, I hope you will take one bit of advice.  enroll NOW in some obedience course nearby.  PLEASE dont wait.  Great Pyr's are BIG dogs with a personality to match.  Add to that the very nature of what they do, (herd/flock gaurd dogs) they take thier jobs very seriously, and YOU are the only one who can now set limits for them.  Or they will set thier own.  Gracie, needs to have an understanding with you, that when you acknowledge a stranger, and begin a conversation, that it is her signal to back off, dont let her take control of this, or she will fast be the alpha on your property, not you.  What she  needs is a verbal signal from you, a firm 'gracie, enough' should do, and if she doesnt quit, then you havent made your point.  
You have stated that you are not 'dog' people, well, guess what, now you are!  You have entered a whole wonderful relationship that will broaden your whole view!  Please just take a few minutes to start your relationship off on the best foot possible, usually 6 nights, one a week is all it takes, and you will have more than just a trained dog, but a solid understanding, and better partners!  Call your local Vet for class recommendations, they shouldnt run more than 40 dollars, and you only need to take the one dog.  You can pass on the knowledge to the other dog once you have learned it yourself.  
But Again, Gracie is sending you all kinds of warning signs, Please do her, and you, a favor.....  You wont regret it, ever!
Good Luck, and again, CONGRATS!