How relevant is the DXOmark sensor rating to the image quality of a camera? Do you use sensor rating as a reference when you compare cameras of your choice?
I found that some cameras' sensor rating are higher than the more expensive and newer cameras. Case in point, D5000, D90 and Pentax Kx.
I was surprised that sensor rating of the popular 550D, 7D and newly launched 60D are about the same as the entry level D3100.