I have a Canon 40D and I have great success with taking all around Pictures with it, from Scenery, to Sports, and Few Potriats (Outdoor Only). I started with the Original Canon Rebel 35mm the Adre Agassi Endorse and it still works like the first day I bought it. I up to the Canon Digital Rebel XT then the 40D. The lenses I have for the Digital are The 17-88mm IS EF-S, the 28-135mm IS EF and last a 100-400mm IS EFL. I considered my Digital all investments and I have been seriously looking to make a major investment in the EOS 1D Mark III or the IDs Mark III. I know the 1Ds has the full frame and the 1D does not. But I want to know more and get more feed back. I know there is a 4000.00 dollar diffrence even seen a 1Ds at a camera exchange for half the retail price canon offers. (Use of Course) Any feedback will be greatly appreciated.