FWIW I find VR for a concert lens of marginal value. I tend to find that when I'm shooting slow enough (shutter speed wise) that lens shake might be an issue, they I'm also usually impacted by movement of the performer as well. I have the Nikon 70-300/2.8 VR and love it but I usually don't get any images with that lens that I would not get with the VR disabled. It's more a factor of the fast aperture that make that lens my choice. Sigma and Nikon both make a non VR version of that lens that can be found for $500-$800 and would be a great choice for concert shooting. I also have several fast primes (35/1.8, 50/1.8, 85/1.
and love them all, my comment with the 1.8 lenses is the depth of field gets very shallow so hitting focus right on get challenging.
Finally, the D7000 does have great high ISO performance so bump it up and accept a bit of noise and you will still come away with some great images. I typically shoot manual WB and exposure for concert stuff, just keep an eye on the histogram to double check exposure, it is the photography equivalent of the level meter.
This is with my D300 and 70-200/2.8VR