D300s user looking to upgrade

Good morning well hmm ok ill jump in with my .02cents here. I'm not a pro by any stretch of the imagination. I own a d750 and a d500. I started with an ancient Nikkormat FTN about 25 years ago, went to the F100, jumped to the d100. Then took an absence bought an d750 about 2 years ago, and last month the d500.

I shoot nothing specific so I'm all over the board as far as specific type of photography. I do gravitate towards wildlife and nature landscapes. Add a few family events so lighting is all over the spectrum as well. I shoot at night as well. Now my lens are a mixture of old and new. Straight up FX lens are the kit 24-120 kit lens, 16-35 and the 200-500 tele(works  awesome with the d500 by the way). The rest are older primes like a 50 1.4 and the old work horse 80-200. Sorry lengthy post here please bear with me.

I have found lately that I have been grabbing the d500 more and more lately, main reason is it fits what I do more and well the ergonomics I find are better laid out. Yea but difference between the amerature and pro level bodies. I think you will find that a huge plus. The difference of the mega pixel resolution I really don't see a difference. I'm not sure of your post processing so I'm winging it in my "advice" for you. I really enjoy the speed of the d500 compared to the d750 10 fps vs 7 fps not sure if you are into spraying and praying but coupled with the focus system you will get USABLE shots out of the d500. Price wise honestly they are comparable, I believe where you will see a difference in the lenses. Its no secret dx lens will be cheaper than an fx. That's is a consideration in you upgrade thinking.

Boiling it down, I would buy a d500 and concentrate on good glass for later purchases. I hope I gave some food for thought good luck. Black Friday sales are upon us keep that in mind as well.