Elgato 10WAA9901 Premium Facecam Full HD 1080p60 Professional Studio Webcam

Major upgrade if you know what you're doing. This camera won't magically make you look good, but if you get the settings right and have good lighting, the quality is stellar and is probably only beaten out by a much more expensive DSLR.

If you're a new streamer, don't break the bank on something like this unless you know what you're doing, but if you're looking to take a step up in quality, this camera will be just what you need.