I own both a D7000 and a D600. Since I purchased the D600, the D7000 doesn't get much use. I know the D7100 is a step up from the D7000, but I'm really liking the results using a full frame camera. If you don't own FX lenses, then I think the cost factor of having to purchase them might come into play when considering which way to go (DX vs FX). Good luck and whatever decision you make won't be a bad one since both cameras are great buys.