D700 vs D800
I have both, and they're both terrific. The D7000 has a bit more resolution, but to me the biggest difference is focal length. If you need the 85mm to be 85mm, then you'll want the D700. If you're ok with the 85mm being 128mm, then the D7000 will get you slightly better image quality. I like to shoot wide, so the D700 is my main body. But either way I don't think you'll be disappointed.