When you
compare the D40x and the D80 they are very similar. I'm leaning towards the D80 because its a little bigger and I have a tendency to be rough on my gear out in the field.
I also hear that both cameras have a slow auto focus speeds which is a concern. A friend of mine has the D70x and he upgraded to the D80 and he uses the D70x more than the D80.
I'm don't know what to do.