Just make sure you see both parents and that they are good natured. We had German Shephards when I was a child, loved them to bits but the last one, bless him had rickets, broken tail, eye problems, oh the list went on and we knew we should have stayed away but we didnt but he turned out to be one of the best dogs we ever had. Since being married we have had boxers, brilliant with the kids, so good natured but maybe a bit bouncy for some. We got all ours from rescue centres and although breeders are good, it does feel good to save some from the centres. But f you do go, be warned, the kids will want them all!
Good luck Jase choosing, we are desperate for another but cant at the mo but make sure you put some pics up when you get him or her.