What type of dog do I need?

Ok, so I need a dog because my last one past away from parvo. I am very athletic, loving, and want a dog that is very gentle and great with kids. I have a 2 year old brother that loves animals and i want something that would be good with him. I need a dog that is moderate in cost, sheds little or moderate, and can be at home alone for more than an hour to two. It needs to be a healthy dog that is not very prone to parvo or kennel cough ect. Thanks!