The brand is less important as the specs, but, the higher the specs, the higher the price.
It all depends what you want to do with it. If is it ONLY as a Conference WebCam, get a cheap one, USB, with good specs.
See reviews on the net, (ZDNet etc). Look in google for webcam reviews. If the solution is out there, let us know it was helpful, so others can benefit from it as well..