Thanks for the lovely suggestions everyone! The key suggestion, though, came from Meg, who directed me to Pandora, where I plugged in "White Christmas" by The Drifters (another all-time favorite), and in the mix it produced for me, I stumbled upon an album I'd tried to buy years ago only to discover it was out of print. Could not be had. Unless you had an old copy, of course.
I hadn't searched for it in ages, and so I logged onto Lala.com (my mp3 purchasing and downloading service of choice), and there it was. Turned out it was re-released only just this past October.
Holy crap, so worth the wait. Phil Spector's wall of sound meets Christmas. Go buy or download it now. iTunes has it too. XOXO