I'm so happy to hear that you are interested in getting a pitbull. I must agree with the posts here, PLEASE at least look into the option of adopting.
Right now is the most crucial time for this breed. The laws and bans will slowly bring this breed into extinction, due, the most part to the Back Yard Breeders. People keep buyin' them, so BYB's keep producing them.
There are puppies for adoption, but hey, you might even find an older pit that you fall in love with. I accidently found my dog, she's around 4-5 years old and it makes me love her so much more knowing the pain she suffered and the future that could have been for her. Not only can you get a great dog, you can also really truly feel good about how you aquired your dog.
You said you dad almost had heart failure when you told him of your plans to get a pitbull, while the stories people hear on the news are horrible, you never hear that the pitbulls 'worst' trait, their great strength, is also their best trait. The pain tollerence of the pitbull is extremly high, which makes this breed great for families with children. As we all know, kids play rough, no worries about your kids hurting your dog and biting like there is with a smaller or weaker breed.
PocketPit said 'Part of owning a Pit Bull is having thick skin so you can deal with the people who are unfortunate enough to not be able to share their life with one of the best breeds ever.'
Please be prepared for this as well, people will shout things at you, cross the road when they see your dog, and in some extreme cases (this happened to me) maybe even spit at you! This is now simply part of owning a pitbull. Although we shouldn't have to face this, it makes me proud that I DO own a pitbull, media-brainwashed people like this have never met a pitbull and have bias, pre-determined, un-educated veiws.
What ever your decision, congrat's on getting on of the best breeds ever! And one more tip...don't take tips from people who have never owned a pitbull or that don't know the breed.
Tinka and Molly