If the breeder is any good, the first thing they should do is try to talk you out of the breed. If they didn't grill you about the type of home you will provide to this very demanding breed, I would keep looking. A decent breeder will gladly return your deposit rather than have to take the dog back because it doesn't work out. They always want to make sure their puppies find the best home the first time. http://www.bcrescuenc.org/newwant-bc.htm
Before you pick a breeder, you should at least talk to more than one. I would call one of the breeders on this list just to chat. I've never met a reputable breeder who won't talk your ear off about their breed, highlighting both the good and bad traits. http://canadianbordercollies.org/market ... -trainers/
Since you don't get your dog until December, you could also attend a dog show and talk to breeders there.
You've asked for advice, and then chosen to ignore it. Please, for the sake of the dog, and your own sanity, make sure you are making the best choice.