Certain bodies are better at some things than other bodies, but all of them with take excellent shots in most any circumstance, dependent on the photographers skills. I think we tend to trap ourselves into thinking that something is a "this camera" or a "that cameras" when it excels at one aspect, but is way more than adequate for anything else.
I never thought of the D700 as a jack-of-all trades, anyway. Certainly the cameras that have come after it have exceeded it's capabilities. And you only get 12MP compared to a D4's 16.
The D7100, by the way, is a excellent and durable camera. I wouldn't hesitate to use it in rough conditions.
Nikon has not produced a "pro-body" DX camera since the D2 series. I would not expect one as long as you can put a battery grip on a DX series body.