Are you worried about the D800's build quality?

I don´t agree that the D800 is "very tough".

The bottom panel is of very questionable quality, and quite fragile. Some really cheap cast metal, if you ask me.

I´ve already broke mine at the short end adjacent to the battery compartment, by a mild "thump" into a wooden staircase.

I have had (and have) several cameras that have been subject to much more harsh treatment - including the D300 - without any damage.