EOS 1DMIII (not 1Ds) is the perfect camera then, you have already given the limiting requirement of 10fps (e.g the Nikon equivalent D2Hs is "only" 8fps) . The 1D MIII is more than capable of what you are probably searching for.
Although, given the high price of around 5,500$ (only converted price from current €-worth), you will have to spend at least another 3-4k for appropriate lenses (Unless you already own some) - Depending on the focal length range you're trying to cover.