I had planned on getting 2 new lenses with my budgeted $3000. But now im thinking i might get an full fame body and 1 lens. I currently have a Nikon D7100 which i like but am always wanting a wider view so getting an FX body seems the way to go. The lens i want is around $1500 ish, so the body would need to be around $1500 too. From research i can get a Nikon D650 or a little stretch in the budget would get me a D750. As far as i can tell through reviews the D650 is quite close to the D7100 aside from the DX, FX thing. How does the D750 differ from the D7100 and the D650?

Would also love to see photos or hear your reviews if you own or owned these FX bodies?