I bought Aion on CD a few months ago (after seeing Lisa Gerrard on the telly) & then found a vinyl LP of it in a 2nd hand shop soon after. The LP is a bit tatty but even so the dynamics are way beyond what's on the cd. It's as if someone's moved the speakers a few feet further apart, an almost eerie sensation of space. If SACD can do the same thing it's worth a go.