<p>Jay,<br>
I carefully considered what to get to replace my D300/D700 pair. I like having both DX and FX, and those two shared memory cards, battery/charger, and grips which is very convenient, and the sensors were approximately the same pixel count..<br>
I got a D7200 and D750 to replace them as those two share memory cards and battery/charger. Unfortunately not the grip. The pixel count on the sensors is nearly identical.<br>
I considered the D500, but my interest is primarily landscape/wildlife and people - things that aren't moving real fast, so the D500 isn't really the right camera for my needs.</p>
<p>As far as the size of the D7200, though it is smaller than the D300 it fits my hand as well or better; that is why I said it doesn't feel noticeably smaller in my hand. The D750 feels more similar to the D300 or D700.<br>
I really wanted a "D400" that shared the D750's size and grip. :<</p>