I've had all the D1-4 except the D1x. If I were you, I would keep your D2H and get a D7000 (there is a fire sale on used ones right now due to Nikon promotion and so many selling to get the D600).
If you can afford it, get the D600. It has very high ISO and resolution. You can crop and still print 17x22. There may be a Christmas sale, and there are so many buyers rushing in that there will be plenty of mint used ones soon.