Since it is that time of year...I recommend "We Three Kings" by the Roches (lots of humour and inventiveness) and "Too Many Santas" by the Bobs (acapella group extraordinaire). Manhattan Transfer has a new one out...haven't heard it yet but would blindly recommend it. The Bobs have a "Best of / 20 songs, 20 years" which is worth hearing.
Anyone else have suggestions?
Steve