I am a dermatologist and do a lot of medical / skin photography. OMG the D800 is very difficult to hand hold for close ups of skin lesions. I use a R1C1 and 60 mm AFS macro. No problems with the D700 but I definately need to knock down the megapixels with this unit.
Do not settle for mediocrity. Rather strive for excellence for even in that attempt lies a measure of success.