Originally Posted by JimBorden
Forgot to mention....
if you are doing wildlife photos--the D300 would be better than the D700 because of the 1.5 crop factor--it gives you effective lens length with high resolution for better picture composition. If you are taking landscape shots, then the D700 would be the one to have.
However, you can manually crop the D700's images down to match the D300's. This allows you to crop out unwanted elements in your picture and potentially improve the composition. Plus you still have the entire d700 frame if necessary. The D700 gives you more flexibility. I like having as much resolution as possible. I shoot a canon 1DS mkII and a 8x10 film camera as well.