Logitech Web Cams

I’ve used several Logitech webcams over the years, and I’ve always found them solid, reliable choices. Your choice will depend on how much you want to spend and what features are important.

Of the three models you mention, the QuickCam Messenger is the most inexpensive model. The other two have added features, including automatic face-tracking and digital zoom. Frankly those features are less important to me personally, but if cost is not an issue, it might be worth the extra $30-50 just to play around with them.

Logitech has a complete comparison chart.