I need to know which webcam to get

Any webcam made by the "bigger" companies (Microsoft, Logitech, etc) in that price range are decent cameras.

Some have built in microphones, and some don't. It all depends on your needs.

Most have adjustable feet or clamps for flat panel monitors.

I don't know what kind of stores are around you, but Best Buy or any other electronics stores usually sell these brands.

I believe Walmart even carries some now.