Greetings from Oregon.
Get the camera that best fits your hand, your eye, and your wallet. (It might be that you already own it, although the D5500 and the D7100/D7200, and a great many others, all offer upgrades.) But good glass is a must for whatever body you want to attach it to, so give some real consideration to the lenses that you choose as well the camera body you ultimately decide on.
You also can find a great deal of online help by running comparisons of one Nikon vs. another, paying particular attention to the Pros and Cons of each model to determine the one that checks off the most boxes on your wish list.