Doberman for my first dog?

I've never had a dog before, and I want a doberman pinscher from a real breeder, not a pet store. I didn't just wake up this morning and decide I wanted a doberman. I've done plenty of homework. I want a dog that will be loving with my parents and nieces, and when I have children, to love them as a part of the family. I've read several dog training books, and even Cesar Milan's be the pack leader. I also found cles at the YMCA that offer puppy training and socialization for 8 weeks, followed by advanced dog training for 7 weeks. I also will be taking my puppy to my sister-in-law's daycare and let him play with the children (under supervision of course) just to get him socialized while he's still a puppy. I have an average size house and a small yard, but I enjoy running and will take my dog with me when he's old enough, but will walk him every day, weather permitting. Do you think a Doberman will be a good first time dog for me?