I am still trying to get my head round the whole HD system. I believe that to get any of the new sound formats you will need to hook up the 5.1 pre's between source and amp. Unless you have an HDMI input on your amp and the amp supports the new format. But since this require the HDMI 1.3 spec that means there are no amps that currently support this. Then my problem starts as since HD-DVD does not support SACD or DVD-Audio I was planning to keep my SD player which also uses the 5.1 connections. My head hurts.