Lindy-
The SDI Silk board is a "serial digital video" interface board, and is probably only appropriate for devices that have SDI signals internally to begin with, like set-top DVD players, digital satellite-TV receivers, Tivo recorders, etc. Laserdiscs are an analog video format, so to feed their signal into a computer, you will have to digitize it at some point. If you specifically want to use DScaler, then you need to use an analog video capture board as discussed elsewhere on AVS Forum. If you would rather have the video digitizing done outside of the computer, then an analog-to-DV device like the Dazzle Hollywood DV Bridge or one of the direct-pass-through DV camcorders, along with an IEEE1394 ("FireWire") board, is probably the best way to go. There are analog-to-SDI devices that you could use with the SDI Silk board, but this combination might be close to a 'cost is no object'-type plan compared to the prices of the DV/1394 stuff. I don't know if the SDI equipment would really give you a big quality improvement over DV for the much higher cost.