Upgrade to D610?
I currently use a D200 (very low shutter actuations) with prime lenses ranging from 24mm to 200mm (all FX, AF-D and Ais lenses). I shoot primarily landscape (more landscape portraits than vast vistas) and abstracts. I shoot more with longer focal length lenses than wide angles. I print up to 13x19 and display and sell photographs in local galleries.
I know D610 will bring improvements in dynamic range and enable cropping. However, I am fond of D200 colors at 100-200 ISO. Will there be improvements with D610 in that regard or does D200 still hold its own in colors?