I am purchasing my first DSLR and am hung up on a few details when deciding between the Nikon D90 and Canon 40D. I plan to shoot a considerable amount of college baseball, so I am wondering how truly important fps is? The D90 shoots 4.5 fps and the 40D shoots 6.5 fps, should this be a huge deciding factor for me? Please keep in mind that I am a total noob so I may be overlooking another key spec important for shooting baseball. Thanks for your help!