You pose a good question. I have a D700 and I think it's all the camera I'm going to need for a long time. However, you are good to question the D700 choice if you are used to heavily cropping a D7000 image for your final results.
I find the 12MP adequate for all of my work which includes some full fame printing. I do heavily crop the D700 frame for the web and for 8x10 images with good results and landscapes figure in a lot of what I do.
However, you are going to loose the crop factor and that may mean new lenses - I don't know if you've figured that into your post production cropping scenario. With the right lenses, I wouldn't hesitate to recommend the D700 to anyone wanting to take quality images, but I'm just not sure how interpret your usage.
I guess if there was anything "profound" I could say to your request, it would be to question whether your proposed moved to FX was really required. From what I read on the surface, it would seem to me that more appropriate glass to meet your landscape and basketball specialties might be a good next step.
Roger It's still, ISO, aperture and shutter-speed, right?