Hello - I am an amateur who is becoming more serious about photography and looking to buy a new DSLR. I have read much about the Nikon D200 as well as the Canon Rebel XTi but have also looked at several used D70's. I don't want something that is over my head, but do want something that will grow with me. I will be taking action shots of my daughter's soccer team. I would welcome any recommendations on cameras/lenses.