Jazz groups are the one category we've only lightly touched on. While everyone is familiar with Lambert, Hendricks, and Ross; how about Lambert, Hendricks, and Bavan, with Clark Terry, and Coleman Hawkins. Here is "Sack Of Woe" by them.
http://www.youtube.com/watch?feature=player_detailpage&v=--dBgh8Y52Y
New York Voices is another group I like; here's "Stolen Moments", an Oliver Nelson tune, they do very well.
http://www.youtube.com/watch?v=CP6mX_HtgGI
Manhattan Transfer is another fine group; lets take a trip on "Route 66"
http://www.youtube.com/watch?v=mQwb4SpNuKo
There are many new groups that I'm not familiar with. Tell us about your favorite groups, or other tunes by these groups.
Enjoy the music.