Assuming you want to stay with the DX sensors, you have lots of choices. Even the bottom line cameras will give you far better tech. If you like wide angle stuff, you might want to upgrade to the FX sensors. However, that comes with a bigger price tag and often requires lens upgrades.
If you like the control layout, you will want to stay with the pro line (D300, D500). Large bodies, big performance, big price tags.
The smallest bodies are the D3000 and D5000 lines. The technology is great, but I don't like the small sizes in my large hands.
Given your older lenses, these two lines may not autofocus since the bodies have no focus motors and require AF-S lenses.
If your lenses are the "screwdriver" AF ones, you will need the D7000 higher lines to get the needed focus motor in the camera body.
Personally, I would never go below the D7000 line due to wanting all the extra buttons and liking the bigger bodies.
Your best bet is to go to a camera store and play with the cameras to see which ones you like best for the feel in your hands.