Agree, go with lenses. Allow the D500 to drop in price its a win win. I would look into the D750, i used it for a month travelling around the british isles and its very, very capable with regards to birds in flight which is always an acid test. Landscape its unreal, great colour and barely any noise (using a 50mm 1.8d and 7-200mm f4). I was so , so impressed. For me the D750 is overlooked by many as it falls between the d7200 and d500 in price people seem to think its less set up for pros. Facts are its full frame, so will produce incredible images with reasonable glass and it can be used for a variety of things if need be. Its also a lot cheaper now. My humble opinion! I have a full frame and crop so no bias here.