Hi folks- I was thinking that I wanted a nikon d80, because of the 10.2 megapixels. My wife is saying that the D70S with 6.1 megapixel will do the same thing. I am wanting to take action pictures of kids doing gymnastics meets. I intend to blow up some pictures to be the size of posters (20x24 or so). Will the D70S perform the same with the lower megapixels as the D80?