My long time favorite is A Christmas Gift For You From Phil Spector, which contains the fantastic "Christmas (Baby Please Come Home)", written by Ellie Greenwich, Jeff Barry, and Spector, and sung by the great Darlene Love, one of my favorite female singers.
I just ordered Christmas Everywhere, the new album by Rodney Crowell on New West Records, available on LP and CD. New West LP's have a sticker on the shrink wrap that reads "Audio Mastered For Vinyl" (whatever than means).
For more sacred Christmas music, there is a lot from Classical composers, J.S. Bach being foremost. His Christmas Oratorio and Magnificat in E-flat major are must-haves, as is Handel's Messiah.