I'm gald that you had the opportunity to try out the puppy before making any commitments. That was awful nice of the owners.

An adult dog does sound like its the way to go.
Please consider all breeds though, I know you had a terrible experience with a rott, but if bred & raised properly they & pitts are AWESOME family dogs. Many good reputable trainers & vets will say that they may ever surpass the lab & golden as far as being a family dog if they are bred & raised properly. I'm not saying you have to or should get one but please don't over look them completely. But if you truly feel you are better off with another breed than by all means go for it.
I wish you the best of luck!