Robert,
On-camera lights are often a necessary evil; that is that the light coming from the direction of the camera is as un-elegant as possible, with little character or modeling, yet sometimes it;s the only way to provide illumination in a flowing, dynamic scene.
There are many types of on-camera lights, but the best is characterized by being as large, soft and controlable as possible. My current favorite is the “Lite Panel” which is a daylight balanced LCD lite that has precut color correction gels and a dimmer control. Granted it’s expensive (about $1000) but it comes with a self-contained battery and will probably last you through several future generations of camcorders.
The AB Ultralite is a well accepted on-board light and can be enhanced with the Chimera accessory that makes it quite soft and useful, and AB even offers an HMI source that attaches to the Ultralite base to accomodate the often required daylight balanced supplemental lighting.
I’d shy away from anything Smith Victor for any rugged use or long term life, its cheap price probably accompanies its limited usefulness.
Whatever light you decide on, look at the Isreali Arm mount as a way to get the unit further away from the lens to enable some modeling or directionality to the light source.
JS