Hi All, I am new to photography and am after some advice. I am looking to invest in a camera to mainly take shots for the company i work for. These will be predominately action shots as we run fitness classes outdoors. I will need a camera that can do this and probably at low light as the summer slowly dwindles away. I haven't got a large budget so any money saving tips would be great. I was looking at a D90 with the 18-105 lens bundle then hopefully adding a 70-300 lens soon. Will this be a good investment?