I've been shooting with a D80 for the last 4 years. It was my first DSLR. Before that I had a 1970's Canon that I used purely for hobby. I have 1-2 sessions per week and mainly do family/children/newborns. I use mostly natural light. Whenever possible I shoot outdoors although lately I have been using my sunroom as studio. I'm thinking of an upgrade but would love some feedback on which camera to upgrade to. My business has quadrupled in the last year. I don't look for this to be a full-time job but would love to have 3-4 sessions per week.I appreciate any feedback.