I don’t know much about that specific camera, but just some general advice. A dslr would be your best option, as it gives you interchangable lenses, for instance you can use regular lenses for most shooting and a fisheye for spherical panoramas if you want. Also when shopping for a dslr, make sure you consider noise as well, I’d favor a lower MP if it had noticeably less noise. You will tend to find that past a certain point, the benefit of a higher res sensor will be negated by softening from the lens. As to the lens, a prime is a good choice as they usually have high sharpness while maintaining minimal distortion vignetting and chromatic aberration, again, I don’t know a lot about Nikon lenses specifically.
If your looking to do any kind of portrait photography, most people favor a shallow depth of field to seperate subject and background. In which case you’ll want to consider the sensor size (bigger equals shallower dof), and larger aperture (lower F/number equals shallower dof).
Having said all that, even your entry level dslrs give you pretty good performance, personally I use a Canon 500D and the cheap 50mm prime for most of my texture photos, or at least the ones I can’t scan. I rarely find that it’s my camera or lens that holds me back when doing textures, far more often I find it’s the lighting or reflectivity of what I’m photographing that gives me problems.