On My Flickr Feed, I some times get questions about my use of camera. “Why”, it is asked, “do you shoot with a 450D/550D”?
I understand the question completely. When I was photographing professionally, I wouldn’t have dreamed of using the then-bottom-level camera (the 300D, at the time, I think) even as my back-up camera. The 10D (and later the 20D and 30D) was my the back-up and second-lens camera to my 1D.