The title of your post refers to the 800E. Do you mean the 800E specifically or the 800/800E generally? In either case, it is unlikely that you will see a significant improvement over your current D7000 in your professional work. Web images are restricted to about 1 megapixel and books to about 7 megapixels (assuming 8 by 10 inches at 300 pixels per inch). In your professional work, what you gain is convenience and maybe speed. This is so because when you mount your 105mm Micro-Nikkor, its field of view is larger on the D800 by a factor of about 1.5, as compared to the same lens on the D7000. The benefit is that you can fire away without thinking about compositing, framing or precise cropping. Unless you plan to print very large pictures (over 20-30 inches), you may have a hard time justifying the acquisition of the D800(E).
As a purely amateur photographer, I have a luxury that professionals lack. I don’t have the base my photographic acquisitions on rational grounds. I ordered the D800E within days it was announced. Why? Because I’ve been a Nikon user for about 40 years and for decades I’ve been watching as Canon makes cameras with better nominal specs (that don’t necessarily translate to better pictures). For me, owning the camera that is arguably the best camera ever for landscape and wildlife photography is reason enough for me.