I have a choice of three, the choice depending on how much weight I can stand to carry and how good an image I am looking for.
Nikon D810 with a 24 70mm f2.8 lens and a 70 to 200mm f2.8 lens. This set is quite bulky and heavy, but produces images that challenge ones produced by my Mamiya RB67 medium format camera, you do need to take extreme care with the D810 to produce images of that quality.
Nikon D700 with a 24-70mmf2.8 lens (purchased 2nd hand) and a 70-300mm 4f-5.6 lens.
Sony A35 with a 28-75 f2.8 lens, small light weight camera, produces excellent images (I have a good lens on it), battery goes flat in no time (around 2 to 3 hours), extra batteries essential.
The D700 usually has a Nikon GP1 gps attachment fitted to it, this allows geotagging of the images. One his to think about uising it as the GPS system is not switched on until the shutter button is push half way. So there's always a slight delay before the GPS produces a position. This method of working means though that the camera battery is not discharged to quickly which would be the case if the GPS was on all the time.
I have had the D700 for quite a while , the D810 is a lovely camera capable of really excellent images and its about a 1 stop better low light camera than the D700, but I kept the 700 as is still and excellent camera.