I used the D700 for many years, primarily with the 24-70 and 70-200. Because of a very bad hip, and the fact that the majority of my photography is events, mainly low-light, I switched to Fuji x-system in 2013 and no regrets. I typically shoot with 2 camera, and have the 16/1.4 on on body - raised on a monopod for some unique angles ... the x-system is ideal for event photographers. I have several fast primes as well as a couple of zooms, and used the 10-24 a lot as my landscape lens on a recent one week trip to Acadia.
