Looking for new Nikon DSLR?

Hi… I've been a professional photographer for about five years now and have been looking into a new camera. My budget for both the camera and lens is under 1600$ or so… I used to practice macro but now am looking to get into portraits… My question is what would be a good nikon dslr that is not expensive as the D4 but still offers some of the same professional perks and image quality of it?
also would sticking with the lens it come with be a good idea… Or should i invest in a certain lens for portraits… Thanks.

Budget for both the camera and lens is under 1600$ … And you said your a professional? I have more in my camera than that and I'm not a professional. To be a professional you have to have most of your income from your photos and I bet your no where close to that. If you were a professional you would not be asking this question and you would not be looking at a cheap $1600 camera.

If you're a pro of five years, you'd know exactly what to buy.