Looks like the 5D Mark III is better than the D800 at everything except megapixels:
Have a look at page 11 of this thread...
5D Mark III, 40D, 1V. Bunch of strobes, lenses and other bits.
They're, their, there, it's, its, too, to, than, then, you're, your. One lens, two lenses, the lens's aperture.