I love my D7500. Love it. You couldn't go wrong upgrading to it except if you needed a vertical grip or dual memory cards. If that is your budget, its a sweet camera- jump all over it. The D500 is obviously the best choice if you can swing it. Even though it's older, the sensors are the same in the D7500 and the D500 but you get a whole lot more focus points in the D500 than the D7500. If you need those for tracking birds, get the D500. Anything not a bird, get the D7500. Tracking is still really good in the D7500 though. You also gotta choose if a pop up flash is important to you. You get one on the D7500 even if you don't use it. You want one on the D500 only when you really need it. Then there's the Z50. Basically a D7500 with a Z mount. If size is priority, grab this- its tiny. Technically your lenses would probably work with the FTZ adapter but to really unlock the purpose of the Z's, (why get a tiny camera if you gotta pack around a bulky adapter AND lenses) you need the native glass. If any of your lenses are the older screw drive, (which focus just like normal on a D7500) they turn into manual focus only on the Z. Plus you're back to a single card and no battery grip and also no native Nikon macro lens yet. Speaking of macro, I prefer my D7500 for macro shots since the screen can be set to be your shutter, just tap it and the shutter closes. Really handy for macro. The newer Nikon app, Snapbridge is so much better than their older app, WMU I think it was called. I didnt think I would use this feature much, but it comes in handy when I do and since it works so well, it gets used more and more. Plus there's another way to do macro since you can use your phone to change settings and take pictures through the app. Don't be quick to write off the D7500 because of the negative publicity. I still feel like its 95% of the D500 for 50% of the cost.