My work is looking at getting a camera with a remote controlled head that records in HD (720p or 1080i). The problem is, the only outputs that it has are component, s-video, and composite. Is there a way to record the live HD signal into an iMac (that's affordable). I've seen boxes that convert the analog signal into digital, but the affordable ones won't do HD, and the ones that will convert HD are thousands of dollars. As far as I know, the only way to import video on the iMac is through the firewire port (but I don't even know if that can handle HD signals) Are there any affordable options to do this?