I know many togs who never go above ISO100 because of the dreaded noise, but better some noise and a sharp image than a blurry image. Todays DSLR can shoot ISO800-1600 with no problems and any noise can be sorted with photoshop. I prefer noiseware pro but theres loads of programs out there. So dont let overcast days ruin your sports photography.
Welcome to my blog. My photography is on a tight budget like so many others out there, but through this blog I hope to show that great photographs can be achieved by all.