Webcams can be broken down into tiers: Luxury HD Webcams like the Logitech C930e or Conference Cam Connect for those who want the best.
Popular Mid-Range models for the best of both worlds.
Of note: Logitech's BCC950 and C3000e offer mechanical PTZ - Pan, Tilt and Zoom functions via remote - as well as integrated microphones and speakerphone capabilities.
Given an adequate lighting setup, they deliver very high quality video and audio on ANY modern computer OS without requiring any additional webcam software.
With prices ranging from around - USD there's a camera that meets any budget.
USB Video Class driver compliance built into modern major operating systems makes using these UVC compliant webcams Just-Plug-It-In easy. Evaluate whether you prefer an adjustable focus, want a fixed-focus lens, or cameras that support Auto-Focus.
You may also want a webcam with Built-In USB microphone which most - but not all have.