>>3858903New dad here. I was in the same situation. I went overkill and got a D700.
If I had to do it over again, I'd get something way, WAY smaller.
Consider the following:
Ricoh Gr III
Sony RV VIII (or whatever number they're up to at this point)
Fuji X100V (this is NOT as compact as you think, it is not POCKETABLE like the other two)
If you want swappable lenses, look into the Fuji XE-3 or XE-4.