I too need advice from you experts out there as to what kind of DSLR camera and lens to buy to take good action shots of motorsports action. Mainly NASCAR races. What are good values of the most important attributes of the camera body? Such as shutter speed, frames per second, ISO (keeping in mind some races will be at night, although well lit). What are the most important attributes for camera body and lens?

For the lens, keeping in mind the size of some of the larger tracks, I know I probably shouldn't go less than 300mm, right? Also, keeping a budget in mind, what is the max aperture f number and still achieve good results? It looks like a good 300mm with a f/2.8 is a little more expensive than I would like to spend. Could I get good results with an f/4-5.6?

Can a get a good camera body and lens, for this purpose, at a price range of $1,000 - $1,200? I would be open to any suggestions as to what make and models to consider.

I appreciate any advice you can offer.

Thanks,
Travis