The Nikon D4 is my favorite on-location camera. It's the most reliable camera I ever had (taking this title from my old D3s which it replaced). The 24-70mm lense is very versatile and on my camera 95% of the time. Only for travel I switch to the 28-300 which has a much lower image quality but is more comfortable to carry around. The Really Right Stuff L-Frame makes it easy to use on a tripod with either the RRS Ballhead or Arca Swiss Cube.