Will passing my XBox RGB signal through my Sky+ (V1) box degrade it at all? I could alternatively hook it direct into the 3rd scart socket on my Panny TX28PM12 and the DVD move to AV2 and set to SVideo. At the moment I have XBox looped through Sky and DVD direct to TV. All set as RGB. Is this the best setup? I imagine that there will be nominal difference with setting it up an alternative way.