Like others, I tried a Nikon D800e and was driven nuts by the ergonomics/menu system. Of course, one can get used to that, but I might be inclined to suggest a rather different solution if you don't need AF: get a Sony A7r instead. Aside from costing much less than the D810, it can be used with all your Canon lenses as well as the Nikon 14-24 (does anyone suggest that the Nikon 24-70 is as good as, let alone better than, the Canon 24-70II?). Some who have used both the Sony A7r and the D800e report that the Sony has even better image quality, though of course there's no way of knowing yet how it compares with the D810. Either way, I think those who warn about how difficult it is to obtain very high image quality with these 36mp sensors overstate their case - you can get great results hand-held, and while the very best lenses may be necessary for ultimate performance, you can get impressive results with other lenses too (I recently took a series of photos with an old Pentax Super-Takumar 50mm 1.4 lens on my A7r - very pleasing results).