I would suggest getting a dog that is already an adult. Some breeds are more high energy than others, but individuals in every breed are different. If you get a puppy the only thing you can do is wait for it to grow up before you know for sure how hyper it is going to be as an adult. But with an adult, there are no surprises with energy level, size, temperament, etc. After answering the questions wolfsoul listed, that will help come up with a more specific list of breeds that are suitable for you and your lifestyle. You'll need to research the breed(s) that interest you most to truly determine which breed is right for you. So think about your answers and we'll help you with the breeds.

Are you wanting a dog smaller, bigger, or about the same size as a Lab?