Having recently added a 42" lcd to our home theatre system, we have been struggling to maximise the quality of our Sky satellite signal. We have the old Pace dsr600 decoder which I have been able to set to s-video on the advanced settings menu. Even this already makes a huge difference.

As a newbie to all this (and Geekzone), I have two questions which the very nice but hopelessly technologically challenged customer reps at Sky are utterly unable to answer (or even understand): first, why can't I set the decoder to RGB since it's on the menu and s-video works (it defaults back to composite if I try)? Is there any way to get around this?

Second, what about 5.1 (or better) audio? I would be very grateful to anyone who can provide some added insight on either of these matters, since no-one who works at Sky seems to understand the product they are selling.

(And yes, we have considered upgrading to a newer decoder with component capability, but since no-one at Sky is capable of explaining whether this would actually represent enough of an improvement over the s-video signal we can already get to be worth the money, I thought I would try to learn a little more in places like this forum first. Many thanks for any help.)