Welcome to our Nikonites family! I just got a D7100 too, and I also think you made a great choice!
I hope you'll love it here with us!
Question, why would you buy a D7100 when for little extra you can get the much improved model the D7200. Just wondered in case I am missing something as the D7200 is one that I am eyeing unless I can pull a rabbit out of the hat and get the D750!