Nope, your next step up should be a D70/80 or if your rich D90, they all have motors in the body so you can AF on most older lenses. Commander mode so you can use a nikon speed-light wirelessly. Shoot RAW, AF/MF switch on the camera.
So on so fourth...
As for the MP thing, don't worry about that crap. "Mega pixels" is a cash scheme invented by camera companies and has no relation to image quality. If you want I can explain that, but I rather you just take my word