the Logitech c920 is the best webcam currently out on the market. I do not see the Logitech c930 as a replacement to the C920. Quality is pretty good but the wide angle on the camera is too much.

Im guessing we will see a Logitech c940 (taking a lucky guess at the name) this year. What shocks me is that we haven't seen a new camera from Microsoft. The Lifecam Studio is the last camera they put out