You are a good height for a fitness model, and you look pretty muscular. To be a serious male fitness model, you need to get your body fat index down well under 10%. When I was younger and in top shape, my body fat was 6%. You need to stabilize the muscle, but increase your cardio and get more lean.
For the top fitness publications, male models nearly starve themselves before a shoot, and come in dehydrated. Personally, I think that's crazy and not very healthy, but it is pretty common practice.