Shaggy: Your digital audio will go through the HDMI cables. There is no need for extra cables. Make sure the model you're looking at has HDMI switching, not just pass through.
kf28: The reason that you have everything go through the receiver is that you only have to switch the input on the receiver, not the tv. You only have one more cable, the one that goes from the receiver to the tv. Also most of the upper models clean up the picture as well.