Mon 01-Oct-12 11:22 PM | edited Tue 02-Oct-12 02:26 AM by DavidHarsay
I had the D300S for a few years, and went to a D700 at the start of this year.
I know you said that you don't do sports, but...In addition to what everyone's written, there's an additional benefit to the D700. You mentioned that you have a 70-200 f/2.8. This lens for me was much better at focusing quickly and accurately on the D700. So much so that the crops from the D700 always looked better than full D300S image with the better reach.
Maybe not the best example, but here's a demonstration of a generous crop w/D700 from a very fast moving target (from the top of the grandstands at 1/250s using a 1.4 TC):