Naglfar
As Naglfar devours us all
Wouldn't the prog fans like "Damnation" moreso, since that was far more mellow and prog-like? "Deliverance" is much more aggressive and heavy in general.
My best buddy here, who's a bassist / computer-nerd academic / prog-rock lover, hates Ghost Reveries and loves Deliverance. He also likes Damnation, especially Ending Credits. I have a hippy friend back home who also is really big on Deliverance. I don't listen to much prog myself, I just noticed that my two friends who can actually play instruments with proficiency and are really into prog both loved Deliverance, and either hated or were uninterested in Ghost Reveries.
Although my ear really isn't tuned to prog, I've noticed some prog my friends listen to is pretty heavy, maybe it's just that the distinction between metal and prog has been under assault from Opeth and Porcupine Tree in recent years...
Edit: Just realized it's the first time I've posted here in like 6 months... shameful lurking on my part... ahehehe...