Hi! I started shooting pics of barrel racers for fun w/my little canon S5 IS. Have gotten lots of great shots (In good light) & am now being requested at rodeos, so I need to upgrade to better equip. When I shoot on a very overcast day or a covered arena, telephoto across the arena ( probably abt 70') I'm getting a lot of noise in my pics. Also after sunset with my maximum ISO of 800, my shutter speed is too slow to freeze the action. I need to find a camera & lens that can handle low light telephoto action shots without the noise. Have been looking into the canon 40D - Does anyone have first hand experience with this camera shooting under similar conditions? Or are there any rodeo photographers reading this that could recommend another camera & lens that would do the job without breaking the bank - Until I start making some money at this I can't justify spending over say $800-$1200.