Many here at GMC are happy with logitech quickcam pro 9000, definitely worth it.
Here is my REC page, all vids are shot with it, but the audio comes from a POD. (And forgive my playing, I post this for technical purposes only
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http://www.guitarmasterclass.net/wiki/index.php/FranI believe that Caelumamittendum and Superize latest vids are also recorded with that webcam.
+1
This is a really good and standard web cam! I recommend it! But for videos gennerally any camcorder is a much better option and you can find really cheap ones too (miniDV etc) !