I second the idea of adopting! The shelter will do all of the necessary temperament tests and they should match you with the dog that best suits YOUR lifestyle. I suggest this because #1 - its always nice to rescue a dog that would otherwise not have a life at all, and #2 - if you have no experience with the breed it will be easy to make mistakes with a pup that could later on its life affect its temperament, this goes for any breed, but not everyone understands our breed and some will do just about anything to peg them as killers. In my opinion its kind of like having people sit back and wait for you to make one little mistake so that they can hang you and your dog. By adopting an older already trained and stable dog, you're saving a life AND you're decreasing the risk for the above mentioned.
Commonly, you'll hear people say that you shouldn't take in an older dog because you don't know its history, I've found this to be complete BS, I adopted my Pit Bull mix Dolly from a shelter as an adult and I have never had a problem with her whatsoever, she has no human aggression, she gets along with my cats, she is amazing with kids and babies - no complaints!
Anywho, you've come to the right place for information! I hope that you can atleast consider the idea of adoption and weigh the pros and cons before making a final decision as to where you will get your new friend.