I think your 35mm equivalent is a great walk-around; I have a D800E with a Sigma 35mm f/1.4, and I mostly love it, especially for night street photography. However, I really miss the flexibility of my old 24-105 f/4L on my old Canon 5DII.
My walk around lens if I had the D7100 would be the upcoming Sigma 18-35 f/1.8. It doesn't have VR, but f/1.8! At an FX equivalent f/2.5 (f/1.8 x 1.414), that's faster than the fastest f/2.8 FX zoom lenses. As freaking awesome as recent Sigma lenses have been lately (35mm f/1.4, 85mm f/1.4, etc.), this one looks really promising!