I consider the 40D as one of the best buys on the used camera market.
I upgraded from a 350D to a 30D and it was a considerable advancment in capability. However, the 40D with good glass is a much greater upgrade than the 30D.
See my China smugmug.com galleries at the link below. All images were shot with a combination of 30D and 40D cameras using a 17-55mm f/2.8 IS and a 70-200mm f/4L IS lenses.
BTW: I still shoot with a 40D and combine it with a 7D...
Go for a 40D...still using mine.


