When the D300 was introduced, I decided its specs did not warrant an upgrade from the D200. I upgraded instead to a D700 when it became available, since this camera represents a very significant improvement versus the D200/D300. Similarly, I also will not upgrade to a D600/D800, since they don't meet my criteria for a worthwhile upgrade from the D700. My advice to you is to get a good used D700 and apply the money you save to an FX zoom or prime lens. The bodies of the D200 and D700 are quite similar.