DPL II is awesome. I have never, ever liked any kind of surround enhancement for 2 channel stero music. It always sounded too artificial. Regular DPL didn't work well, either -- surrounds weren't quite right, and the center channel was way too prominent on most recordings.

But, DPLII really does make many 2 channel recording sound like they were mastered in 5.1. Actually, some sound like better masterings than some true 5.1 DTS CDs!! It really is very, very nice.