Thank you for the great contest - yet again
The cameras in order of their historical importance:
1. Digital Rebel / 300D - first affordable DSLR in the world, made digital photography available to people.
2. 1Ds - first full frame digital camera.
3. 5D Mark II - first DSLR to shoot real HD video, revolutionized film industry
4. 1D Mark IV - great camera, great high ISO, great speed, fastest DSLR (when using full resoluiton of the sensor), but no "first" in any respect
If I win I would love to have:
UNDERSTANDING THE CANON 1D MARK IV
(2nd choice: UNDERSTANDING THE CANON SPEEDLITE 580EX II / 430EX II)