Dan, it shouldn't be assumed that the DVD-As will sound better with the 6 analog cables. One point is that the higher resolution which that would allow may not actually make an audible difference to you. Also, unless you have a provision for bass management in the player, a separate component(e.g. the Outlaw ICBM) or your receiver(you don't) for those analog signals, all the bass on the 6 cables will be sent to your speakers instead of the low bass being all sent to the sub, which of course would handle it much better.

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Enjoy the music, not the equipment.