I just went throught the decision process with the Nikon D-80 vs Cannon 40D. I eliminated the Olympus simply because the housings and lense selection wasn't as good. A friend of mine shoots Olympus and loves it, but he doesn't take his camera under water.
I chose the D-80 for the following reasons:
I chose the D-80 for the following reasons:
- Lense selection for the Nikon fit my needs better. Besides I could find all kinds of things out about the Nikon lenses, but the Cannon web site is horrible.
- Button arrangement on the D-80 seemed more logical to me for things I change most often. There were some comments in the reviews about some of the Cannon settings only accessable from the menues.
- Price was an issue as well, the Cannon and Nikon unfortunately do not line up on the same price points, so you have to look at them with features/value. For me the D-80 was a better value. In your case the 400D may be a better value.
- My brother in law shoots Nikon professionally, I keep hoping he will offer to sell me his old stuff