I got this CD, Lullaby: A collection
, when my son was born and I ADORE it. It's simply gorgeous (Some of the melodies actually make me cry to this day!!) There are lullabies from Ireland, Spain, Sweden, as well as more contemporary "sleepytime" songs by Bobby McFerrin, the group Take 6... it's a really nice, wide variety.
The only other thing I can say is that I really did NOT like the Baby Einstein CDs. Yes, they're classical music, but not with classical instruments. More like synthesizers, which I didn't care for. Hope someone else can chime in!