So, after raising the kids, I finally have been fortunate enough to get back into photography again. Wow has this changed since I used to develop my own B&W film. I bought the D500 on the recommendation of a local camera store. I was considering the then newly released D810 because of the megapixels it offered. I think the fps sold me on the D500. So the question, is there a point where the number of megapixels reaches it's maximum benefits? And while I am at it, let me ask about my next purchase. Is there a huge difference in the full frame format over crop sensor?