using Photo Booth with no isight in sight

My 2 week old, new mac pro has brought me much joy, I love it.

However my son and my daughter, would very much like to play with the photo booth. Apples fire wire isight, is no longer produced and sells for big bucks in the used hardware arena.

Are their any of you out their that have any 3rd party webcams, that work well with photo booth? I know that their are plenty of plug and play usb webcams, that will work with the likes of ichat. But from what I have read is that photo booth is some what picky with usb web cams. Slow and unresponsive.