MY DVD Player, a Pioneer 545, will be about 4m from the Receiver, a Marantz 5100, and having just splashed out on a good Digital Coax cable to connect it up I am wondering about CD playback. Can I use the digital connection? If so, is there likely to be much difference between the sound quality on that and using the analogue link? I fear that I may be looking at buying yet more cable!!!!!!