Both work well and will produce pretty much identical results if you use the appropriate sharpening. Here's how I would decide:
- D800 if you want to save a few hundred dollars for other worthwhile accessories.
- D800e if you think you'll second-guess your decision and will think you've bought a camera that produces images that are less sharp.
Incidentally, you can make excellent 2x3 ft prints of wildlife with a D600 as well (or a D700).
The limiting factor for what you plan to photograph is going to be the 70-200mm lens. Even with a 1.4x teleconverter, it's likely to be a bit short unless you're photographing large birds that are acclimated to people. Larger mammals would be fine, but birds will be tough except under the best of circumstances.