USB Camera recommand?

There are few camera are using Firewire nowadays. If I am now using iMac, which kind of camera do you guys recommand? Is there any “USB” Cam can work with iMac with better quality?

You need to use a USB webcam, as USB camcorders don’t deliver a live video feed.
You might wanna take a look at these:

The downside of these is, they all do auto exposure and auto white balance.

can this use for live capture? or other thunderbolt hardware recommanded?