gnar_whalI agree that the lense is more important. What lenses would be good for the Nikon D series?
Finding a good lens as well as a DSLR for 500$ is, unfortunately, a bit difficult. I'd say that Nikon's 35mm is the best option. You can pick it up for about 200$, I believe. But, I would still recommend you get a good camera too, especially when it comes to filming. The D5300 shoots full HD up to 60fps, which is pretty good for a camera with that sort of price tag. I would say you'd have to up your budget if you want both a good DSLR, a good lens, AND a good rig(never forget the rig).