Sugarue/On Top of the World/Christmas, Tonic Sol Fa (self-issued)

I had never heard of these guys until their management got in touch with me, so if you were already aware of these guys' 150 shows a year and their popular PBS holiday special, indulge me for a moment while I tell you these guys are quite the entertaining a capella quartet. Very funky, nothing glee-clubby about these guys, and they set familiar carols to intriguing original arrangements. I've previously admitted to a weakness for a capella, as long as it's imaginatively done, and these guys fit the bill. Their first Christmas album was Sugarue from 2002, eight familiar carols and two originals, "Joseph's Song" and "SNo," all breathtakingly arranged and sung. On Top of the World followed, another holiday album in the same vein, and on the heels of their 2006 DVD Christmas, the recording of their TV special, came a soundtrack CD that essentially mixes live and studio performances comprising mostly songs from their other discs. Check their website for downloads and disc sales.