Forget the old Nikon D300s. The newer D7000 costs less and is superior. Nikon still sells the old D300s for more money because it can, but don't you fall for it. The D300s offers faster frame rates on paper for sports, but I find that the D7000 is still faster overall because it's newer and smarter. If you're a serious sports shooter, you should have a D3s instead.