Hi there. As most of the CS members have put in their opinions about the D7100, finally it still depends on you.
Why not rent a unit & take it for a spin. Go take the pictures that you typically shoot and also shoot subjects that may cause moiré. Take the results and analyse it.
I used to drive a D7000, the predecessor of the D7100, it was a love & hate affair. Loved the sharp images & color, disliked the small buffer. It shines with good lenses but shows the shortcomings of bad techniques & lesser lenses.
High MP sensors (DX or FX) demand the best shooting skills and a nice set of sharp glass. The D7100 has the highest MP DX sensor in Nikon's DX line up.
Thanks for sharing. Now unsure to stick with my D90 or get D7100.