"My guess it's because DD 5.1 is compressed"
That would be my guess as well.
And, as to the prices of the two, I'm betting that the Dual Discs are being subsidised right now by the record companies, and that is why they are cheaper than SACD/DVD-A.

OK....so I got another DualDisc today eventhough I said I wouldn't...but it was the only way the disc could be had, and the salesperson said I could return it if I had problems. When I asked if they had a lot of DualDisc returns, he said yes, and that they were going to be "re-worked".

Anyways, the disc I got was "Ben Folds Songs for Silverman". Great disc and both sides play fine in my 2900, but one of the drives in my PC has a problem with the CD side.

I just picked up the "Sessions from 54th St." DVD by Ben Folds, and it is terrific. Have you checked that out?
Tom

I have been a closet Ben Folds fan....just never got any discs.

I have not checked out Sessions on 54th St......but I will now.