Maybe Ken Rockwell can help?

Quote:

Sneak Peak Summary:

Get the Nikon D200 if you don't mind the weight.
Get a Nikon D40 for everything else.
Get the Canon 5D if you work on a tripod.
Forget the rest.



Comparison: Nikon D200, D80, D70, D50, D40, Canon 5D and XTi

http://www.kenrockwell.com/tech/d200-d80-d70-d50-d40-5d-xti.htm
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Empeg Mk1 #00177, 2.00 final, hijack 4.76