SCART vs. SVideo vs. Dolby 5.1

Cabling up the XBox like I want to is a bit of a hassle: In a perfect world, I’d like to hook it up via S-Video and the optical sound output. The “advanced” (or whatever they call it) video cable (ie. the one that provides the digital audio output) only comes with an RGB-SCART cable from which I could not extract an S-Video signal with colour, only black and white. So I’ve had to settle for composite (same as the Gamecube) with a switch.
Hello Microsoft, I want digital audio output and an S-Video signal cable, please.