I just got back from the ACM Honors show at the Ryman in Nashville. The Ryman is a great concert venue, but does not readily permit DSLR cameras and big lenses. I used the V1 with the 30-110 lens and had pretty good results at ISO 1600. I was generally shooting at 90-110mm. It was always handheld. I quickly moved to manual exposure mode - 1/50 sec and f/5.0 most of the time.
Overall I was pleased with the performance. ISO 1600 is beyond where I would want to use the V1 - ISO 400 is my normal limit but I needed more shutter speed.
Here are a few sample images.
Here is Kelli Pickler sporting her receetly shaved head. She shaved her head because a close friend is about to start chemo treatment.
This is Hunter Hayes a/k/a Dwight Yoakum's lead in