Now, don't get me wrong, you will NOT be unsatisfied with a full frame camera using your FX lenses. I honestly can't tell a difference when I use an FX lens once its in the PC. And the D750 has a handy-dandy extra square in the viewfinder to highlight where you have to frame the shot for the smaller sensor. If I remember correctly I accidentally started a fight between two photographers when asking about FX lenses on a DX body, and they both seemed to be arguing the same point, just differently; "You get reduced resolution, but the pixel density of the sensor stays the same, so an FX lens will be just as sharp as the sensor allows on a DX body"

The thing that I am ashamed to admit about my cameras, tho is that I'm constantly reaching for my inferior P900 with the fake "2,000mm" lens because it has much further reach than my 600mm Tamron while only weighing about a kilo instead of around FOUR!